GitHub - LeetCode-Top-Interview-150/LeetCode-Top-Interview-150.github.io: LeetCode Top Interview 150 algorithm problem solutions

"For coding interview preparation, LeetCode is one of the best online resource providing a rich library of more than 300 real coding interview questions for you to practice from using one of the 7 supported languages - C, C++, Java, Python, C#, JavaScript, Ruby."

SQL I
Level 1
Level 2
Udemy
Top Interview 150
Data Structure I
Data Structure II
Algorithm I
Algorithm II
Binary Search I
Binary Search II
Dynamic Programming I
Programming Skills I
Programming Skills II
Graph Theory I

SQL I

Day 1 Select

Day 2 Select and Order

Day 3 String Processing Functions

Day 4 Union and Select

Day 5 Union

Day 6 Union

Day 7 Function

Day 8 Function

Day 9 Control of Flow

Day 10 Where

Level 1

Day 1 Prefix Sum

Day 2 String


0205	Isomorphic Strings	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table	2	99.18
0392	Is Subsequence	Java Kotlin TypeScript C# Go Python	Easy	String, Dynamic_Programming, Two_Pointers, LeetCode_75_Two_Pointers	1	93.13

Day 3 Linked List


0021	Merge Two Sorted Lists	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00

Day 4 Linked List

Day 5 Greedy


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78

Day 6 Tree


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19

Day 7 Binary Search

Day 8 Binary Search Tree


0098	Validate Binary Search Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Day 9 Graph/BFS/DFS


0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 10 Dynamic Programming


0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 11 Dynamic Programming

Day 12 Sliding Window/Two Pointer

Day 13 Hashmap


0001	Two Sum	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90

Day 14 Stack

Day 15 Heap

Level 2

Day 1 Implementation/Simulation


0202	Happy Number	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Hash_Table, Math, Two_Pointers	0	100.00
0054	Spiral Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation	0	100.00

Day 2 String


0014	Longest Common Prefix	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Big_O_Time_O(n*m)_Space_O(m)	0	100.00

Day 3 Linked List


0019	Remove Nth Node From End of List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)	0	100.00

Day 4 Linked List


0148	Sort List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(log(N))_Space_O(log(N))	9	93.90

Day 5 Greedy

Day 6 Tree


0226	Invert Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 7 Tree

Day 8 Binary Search


0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 9 Binary Search Tree


0108	Convert Sorted Array to Binary Search Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer	0	100.00
0230	Kth Smallest Element in a BST	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0173	Binary Search Tree Iterator	Java Kotlin TypeScript C# Go Python	Medium	Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator	15	100.00

Day 10 Graph/BFS/DFS

Day 11 Graph/BFS/DFS


0210	Course Schedule II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort	4	91.07

Day 12 Dynamic Programming


0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Big_O_Time_O(n)_Space_O(n)	0	100.00
0322	Coin Change	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 13 Dynamic Programming

Day 14 Sliding Window/Two Pointer


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0076	Minimum Window Substring	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2	99.83

Day 15 Tree


0100	Same Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	100.00
0101	Symmetric Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	100.00
0199	Binary Tree Right Side View	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/BFS	100.00

Day 16 Design


0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54
0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, LeetCode_75_Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05

Day 17 Interval


0057	Insert Interval	Java Kotlin TypeScript C# Go Python	Medium	Array	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Day 18 Stack

Day 19 Union Find

Day 20 Brute Force/Backtracking


0039	Combination Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0046	Permutations	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Udemy

Udemy Integers


0136	Single Number	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0009	Palindrome Number	Java Kotlin TypeScript C# Go Python	Easy	Math, Big_O_Time_O(log10(x))_Space_O(1)	4	100.00
0172	Factorial Trailing Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math	0	100.00
0050	Pow(x, n)	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math, Recursion	0	100.00

Udemy Strings


0014	Longest Common Prefix	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Big_O_Time_O(n*m)_Space_O(m)	0	100.00
0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0020	Valid Parentheses	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19
0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82
0242	Valid Anagram	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Sorting	2	97.76
0049	Group Anagrams	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61
0151	Reverse Words in a String	Java Kotlin TypeScript C# Go Python	Medium	String, Two_Pointers, LeetCode_75_Array/String	2	99.69

Udemy Binary Search


0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00

Udemy Arrays


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78
0001	Two Sum	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90
0058	Length of Last Word	Java Kotlin TypeScript C# Go Python	Easy	String	0	100.00
0122	Best Time to Buy and Sell Stock II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Dynamic_Programming, Greedy	1	76.91
0080	Remove Duplicates from Sorted Array II	Java Kotlin TypeScript C# Go Python	Medium	Array, Two_Pointers	0	100.00
0189	Rotate Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0055	Jump Game	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0066	Plus One	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Math	0	100.00
0238	Product of Array Except Self	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Big_O_Time_O(n^2)_Space_O(n)	1	99.66

Udemy Two Pointers


0392	Is Subsequence	Java Kotlin TypeScript C# Go Python	Easy	String, Dynamic_Programming, Two_Pointers, LeetCode_75_Two_Pointers	1	93.13
0125	Valid Palindrome	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers	2	99.11
0026	Remove Duplicates from Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Two_Pointers	0	100.00
0042	Trapping Rain Water	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00
0015	3Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Udemy Famous Algorithm


0053	Maximum Subarray	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32
0169	Majority Element	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89

Udemy Sorting Algorithms

Udemy 2D Arrays/Matrix


0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0054	Spiral Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation	0	100.00
0048	Rotate Image	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00
0073	Set Matrix Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1)	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Udemy Linked List


0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0061	Rotate List	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List	0	100.00
0141	Linked List Cycle	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0021	Merge Two Sorted Lists	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00
0138	Copy List with Random Pointer	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0025	Reverse Nodes in k-Group	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)	0	100.00
0146	LRU Cache	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Big_O_Time_O(1)_Space_O(capacity)	40	98.20

Udemy Tree Stack Queue


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19
0103	Binary Tree Zigzag Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree	0	100.00
0108	Convert Sorted Array to Binary Search Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer	0	100.00
0100	Same Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	0	100.00
0226	Invert Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(N)_Space_O(H)	0	100.00
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	0	100.00
0098	Validate Binary Search Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(n)_Space_O(n)	6	100.00

Udemy Trie and Heap


0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, LeetCode_75_Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05

Udemy Graph


0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24
0133	Clone Graph	Java Kotlin TypeScript C# Go Python	Medium	Hash_Table, Depth_First_Search, Breadth_First_Search, Graph	25	68.87

Udemy Dynamic Programming


0120	Triangle	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming	1	99.79
0139	Word Break	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Big_O_Time_O(n)_Space_O(n)	0	100.00
0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0064	Minimum Path Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75
0072	Edit Distance	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, LeetCode_75_DP/Multidimensional, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19

Udemy Backtracking/Recursion


0022	Generate Parentheses	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0039	Combination Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, LeetCode_75_Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0046	Permutations	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Udemy Bit Manipulation


0191	Number of 1 Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation	0	100.00
0190	Reverse Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer	0	100.00

Udemy Design


0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Top Interview 150

Top Interview 150 Array/String


0088	Merge Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Sorting, Two_Pointers	0	100.00
0027	Remove Element	Java Kotlin TypeScript C# Go Python	Easy	Array, Two_Pointers	0	100.00
0026	Remove Duplicates from Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Two_Pointers	0	100.00
0080	Remove Duplicates from Sorted Array II	Java Kotlin TypeScript C# Go Python	Medium	Array, Two_Pointers	0	100.00
0169	Majority Element	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89
0189	Rotate Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00
0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78
0122	Best Time to Buy and Sell Stock II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Dynamic_Programming, Greedy	1	76.91
0055	Jump Game	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0045	Jump Game II	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00
0274	H-Index	Java Kotlin TypeScript C# Go Python	Medium	Array, Sorting, Counting_Sort	0	100.00
0380	Insert Delete GetRandom O(1)	Java Kotlin TypeScript C# Go Python	Medium	Array, Hash_Table, Math, Design, Randomized	27	93.44
0238	Product of Array Except Self	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Big_O_Time_O(n^2)_Space_O(n)	1	99.66
0134	Gas Station	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Greedy	2	97.52
0135	Candy	Java Kotlin TypeScript C# Go Python	Hard	Array, Greedy	3	83.95
0042	Trapping Rain Water	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00
0013	Roman to Integer	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Hash_Table, Math, Big_O_Time_O(n)_Space_O(1)	2	100.00
0012	Integer to Roman	Java Kotlin TypeScript C# Go Python	Medium	String, Hash_Table, Math, Big_O_Time_O(1)_Space_O(1)	2	100.00
0058	Length of Last Word	Java Kotlin TypeScript C# Go Python	Easy	String	0	100.00
0014	Longest Common Prefix	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Big_O_Time_O(n*m)_Space_O(m)	0	100.00
0151	Reverse Words in a String	Java Kotlin TypeScript C# Go Python	Medium	String, Two_Pointers, LeetCode_75_Array/String	2	99.69
0006	Zigzag Conversion	Java Kotlin TypeScript C# Go Python	Medium	String, Big_O_Time_O(n)_Space_O(n)	2	99.71
0028	Implement strStr()	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers, String_Matching	0	100.00
0068	Text Justification	Java Kotlin TypeScript C# Go Python	Hard	Array, String, Simulation	0	100.00

Top Interview 150 Two Pointers


0125	Valid Palindrome	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers	2	99.11
0392	Is Subsequence	Java Kotlin TypeScript C# Go Python	Easy	String, Dynamic_Programming, Two_Pointers, LeetCode_75_Two_Pointers	1	93.13
0167	Two Sum II - Input Array Is Sorted	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Two_Pointers	2	92.62
0011	Container With Most Water	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, LeetCode_75_Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3	96.01
0015	3Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Top Interview 150 Sliding Window


0209	Minimum Size Subarray Sum	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Prefix_Sum, Sliding_Window	1	99.76
0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0030	Substring with Concatenation of All Words	Java Kotlin TypeScript C# Go Python	Hard	String, Hash_Table, Sliding_Window	11	97.43
0076	Minimum Window Substring	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2	99.83

Top Interview 150 Matrix


0036	Valid Sudoku	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Hash_Table, Matrix	1	100.00
0054	Spiral Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation	0	100.00
0048	Rotate Image	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00
0073	Set Matrix Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Big_O_Time_O(m*n)_Space_O(1)	0	100.00
0289	Game of Life	Java Kotlin TypeScript C# Go Python	Medium	Array, Matrix, Simulation	0	100.00

Top Interview 150 Hashmap


0383	Ransom Note	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Counting	1	99.10
0205	Isomorphic Strings	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table	2	99.18
0290	Word Pattern	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table	0	100.00
0242	Valid Anagram	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Sorting	2	97.76
0049	Group Anagrams	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61
0001	Two Sum	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90
0202	Happy Number	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Hash_Table, Math, Two_Pointers	0	100.00
0219	Contains Duplicate II	Java Kotlin TypeScript C# Go Python	Easy	Array, Hash_Table, Sliding_Window	15	98.00
0128	Longest Consecutive Sequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Big_O_Time_O(N_log_N)_Space_O(1)	14	98.89

Top Interview 150 Intervals


0228	Summary Ranges	Java Kotlin TypeScript C# Go Python	Easy	Array	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37
0057	Insert Interval	Java Kotlin TypeScript C# Go Python	Medium	Array	0	100.00
0452	Minimum Number of Arrows to Burst Balloons	Java Kotlin TypeScript C# Go Python	Medium	Array, Sorting, Greedy, LeetCode_75_Intervals	52	89.91

Top Interview 150 Stack


0020	Valid Parentheses	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19
0071	Simplify Path	Java Kotlin TypeScript C# Go Python	Medium	String, Stack	2	99.86
0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54
0150	Evaluate Reverse Polish Notation	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Math, Stack	6	76.50
0224	Basic Calculator	Java Kotlin TypeScript C# Go Python	Hard	String, Math, Stack, Recursion	2	96.52

Top Interview 150 Binary Tree General


0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(N)_Space_O(H)	0	100.00
0100	Same Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	0	100.00
0226	Invert Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0101	Symmetric Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Big_O_Time_O(N)_Space_O(N)	1	96.33
0106	Construct Binary Tree from Inorder and Postorder Traversal	Java Kotlin TypeScript C# Go Python	Medium	Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer	0	100.00
0117	Populating Next Right Pointers in Each Node II	Java Kotlin TypeScript C# Go Python	Medium	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List	0	100.00
0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0112	Path Sum	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	0	100.00
0129	Sum Root to Leaf Numbers	Java Kotlin TypeScript C# Go Python	Medium	Depth_First_Search, Tree, Binary_Tree	0	100.00
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	0	100.00
0173	Binary Search Tree Iterator	Java Kotlin TypeScript C# Go Python	Medium	Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator	15	100.00
0222	Count Complete Tree Nodes	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Tree, Binary_Search, Binary_Tree	0	100.00
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(n)_Space_O(n)	6	100.00

Top Interview 150 Binary Tree BFS


0199	Binary Tree Right Side View	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/BFS	0	100.00
0637	Average of Levels in Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	2	94.34
0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19
0103	Binary Tree Zigzag Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree	0	100.00

Top Interview 150 Binary Search Tree


0530	Minimum Absolute Difference in BST	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Binary_Search_Tree	100.00
0230	Kth Smallest Element in a BST	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	100.00
0098	Validate Binary Search Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	100.00

Top Interview 150 Graph General


0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24
0130	Surrounded Regions	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find	2	84.66
0133	Clone Graph	Java Kotlin TypeScript C# Go Python	Medium	Hash_Table, Depth_First_Search, Breadth_First_Search, Graph	25	68.87
0399	Evaluate Division	Java Kotlin TypeScript C# Go Python	Medium	Array, Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Shortest_Path, LeetCode_75_Graphs/DFS	1	99.52
0207	Course Schedule	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Big_O_Time_O(N)_Space_O(N)	3	99.99
0210	Course Schedule II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort	4	91.07

Top Interview 150 Graph BFS


0909	Snakes and Ladders	Java Kotlin TypeScript C# Go Python	Medium	Array, Breadth_First_Search, Matrix	4	95.81
0433	Minimum Genetic Mutation	Java Kotlin TypeScript C# Go Python	Medium	String, Hash_Table, Breadth_First_Search	0	100.00
0127	Word Ladder	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, String, Hash_Table, Breadth_First_Search	22	96.00

Top Interview 150 Trie


0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, LeetCode_75_Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05
0211	Design Add and Search Words Data Structure	Java Kotlin TypeScript C# Go Python	Medium	String, Depth_First_Search, Design, Trie	156	99.85
0212	Word Search II	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, Array, String, Matrix, Backtracking, Trie	17	99.16

Top Interview 150 Backtracking


0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, LeetCode_75_Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0077	Combinations	Java Kotlin TypeScript C# Go Python	Medium	Backtracking	15	92.38
0046	Permutations	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08
0039	Combination Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0052	N-Queens II	Java Kotlin TypeScript C# Go Python	Hard	Backtracking	0	100.00
0022	Generate Parentheses	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0079	Word Search	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64	98.51

Top Interview 150 Divide and Conquer


0108	Convert Sorted Array to Binary Search Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer	0	100.00
0148	Sort List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(log(N))_Space_O(log(N))	9	93.90
0427	Construct Quad Tree	Java Kotlin TypeScript C# Go Python	Medium	Array, Tree, Matrix, Divide_and_Conquer	0	100.00
0023	Merge k Sorted Lists	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Big_O_Time_O(knlog(k))_Space_O(log(k))	1	99.86

Top Interview 150 Kadane's Algorithm


0053	Maximum Subarray	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32
0918	Maximum Sum Circular Subarray	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Divide_and_Conquer, Queue, Monotonic_Queue	2	99.34

Top Interview 150 Binary Search


0035	Search Insert Position	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0162	Find Peak Element	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Binary_Search, LeetCode_75_Binary_Search	0	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00
0004	Median of Two Sorted Arrays	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Big_O_Time_O(log(min(N,M)))_Space_O(1), AI_can_be_used_to_solve_the_task	1	100.00

Top Interview 150 Heap


0215	Kth Largest Element in an Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, LeetCode_75_Heap/Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(log(n))	5	70.82
0502	IPO	Java Kotlin TypeScript C# Go Python	Hard	Array, Sorting, Greedy, Heap_Priority_Queue	64	97.22
0373	Find K Pairs with Smallest Sums	Java Kotlin TypeScript C# Go Python	Medium	Array, Heap_Priority_Queue	27	90.23
0295	Find Median from Data Stream	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Big_O_Time_O(n*log_n)_Space_O(n)	83	99.56

Top Interview 150 Bit Manipulation


0067	Add Binary	Java Kotlin TypeScript C# Go Python	Easy	String, Math, Bit_Manipulation, Simulation	1	99.82
0190	Reverse Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer	0	100.00
0191	Number of 1 Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation	0	100.00
0136	Single Number	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0137	Single Number II	Java Kotlin TypeScript C# Go Python	Medium	Array, Bit_Manipulation	0	100.00
0201	Bitwise AND of Numbers Range	Java Kotlin TypeScript C# Go Python	Medium	Bit_Manipulation	3	100.00

Top Interview 150 Math


0009	Palindrome Number	Java Kotlin TypeScript C# Go Python	Easy	Math, Big_O_Time_O(log10(x))_Space_O(1)	4	100.00
0066	Plus One	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Math	0	100.00
0172	Factorial Trailing Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math	0	100.00
0069	Sqrt(x)	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Math, Binary_Search	1	86.67
0050	Pow(x, n)	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math, Recursion	0	100.00
0149	Max Points on a Line	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, Array, Hash_Table, Math, Geometry	7	99.18

Top Interview 150 1D DP


0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Big_O_Time_O(n)_Space_O(n)	0	100.00
0139	Word Break	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0322	Coin Change	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59
0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Top Interview 150 Multidimensional DP


0120	Triangle	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming	1	99.79
0064	Minimum Path Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0063	Unique Paths II	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix	0	100.00
0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82
0097	Interleaving String	Java Kotlin TypeScript C# Go Python	Medium	String, Dynamic_Programming	0	100.00
0072	Edit Distance	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, LeetCode_75_DP/Multidimensional, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0123	Best Time to Buy and Sell Stock III	Java Kotlin TypeScript C# Go Python	Hard	Array, Dynamic_Programming	4	74.67
0188	Best Time to Buy and Sell Stock IV	Java Kotlin TypeScript C# Go Python	Hard	Array, Dynamic_Programming	1	99.73
0221	Maximal Square	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	6	97.07

Data Structure I

Day 1 Array


0053	Maximum Subarray	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32

Day 2 Array


0001	Two Sum	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90
0088	Merge Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Sorting, Two_Pointers	0	100.00

Day 3 Array


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78

Day 4 Array

Day 5 Array


0036	Valid Sudoku	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Hash_Table, Matrix	1	100.00
0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00

Day 6 String


0383	Ransom Note	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Counting	1	99.10
0242	Valid Anagram	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Sorting	2	97.76

Day 7 Linked List


0141	Linked List Cycle	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0021	Merge Two Sorted Lists	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00

Day 8 Linked List

Day 9 Stack Queue


0020	Valid Parentheses	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19

Day 10 Tree

Day 11 Tree


0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(N)	1	91.19
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(N)_Space_O(H)	0	100.00
0101	Symmetric Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Day 12 Tree


0226	Invert Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0112	Path Sum	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree	0	100.00

Day 13 Tree

Day 14 Tree


0098	Validate Binary Search Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00

Data Structure II

Day 1 Array


0136	Single Number	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0169	Majority Element	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.89
0015	3Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Day 2 Array


0056	Merge Intervals	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37

Day 3 Array


0048	Rotate Image	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00

Day 4 Array

Day 5 Array


0238	Product of Array Except Self	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Big_O_Time_O(n^2)_Space_O(n)	1	99.66

Day 6 String

Day 7 String


0290	Word Pattern	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table	0	100.00

Day 8 String


0049	Group Anagrams	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61

Day 9 String


0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 10 Linked List


0002	Add Two Numbers	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task	1	100.00

Day 11 Linked List


0082	Remove Duplicates from Sorted List II	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List	0	100.00

Day 12 Linked List

Day 13 Linked List


0025	Reverse Nodes in k-Group	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Big_O_Time_O(n)_Space_O(k)	0	100.00

Day 14 Stack Queue


0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Day 15 Tree


0108	Convert Sorted Array to Binary Search Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer	0	100.00
0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Big_O_Time_O(N)_Space_O(N)	1	96.33
0103	Binary Tree Zigzag Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree	0	100.00

Day 16 Tree


0199	Binary Tree Right Side View	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/BFS	0	100.00

Day 17 Tree


0230	Kth Smallest Element in a BST	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0173	Binary Search Tree Iterator	Java Kotlin TypeScript C# Go Python	Medium	Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator	15	100.00

Day 18 Tree


0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(n)_Space_O(n)	6	100.00

Day 19 Graph

Day 20 Heap Priority Queue


0215	Kth Largest Element in an Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, LeetCode_75_Heap/Priority_Queue, Big_O_Time_O(n*log(n))_Space_O(log(n))	5	70.82

Day 21 Heap Priority Queue

Algorithm I

Day 1 Binary Search


0035	Search Insert Position	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 2 Two Pointers


0189	Rotate Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 3 Two Pointers


0167	Two Sum II - Input Array Is Sorted	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Two_Pointers	2	92.62

Day 4 Two Pointers

Day 5 Two Pointers


0019	Remove Nth Node From End of List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Big_O_Time_O(L)_Space_O(L)	0	100.00

Day 6 Sliding Window


0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59

Day 7 Breadth First Search Depth First Search

Day 8 Breadth First Search Depth First Search

Day 9 Breadth First Search Depth First Search

Day 10 Recursion Backtracking


0021	Merge Two Sorted Lists	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00

Day 11 Recursion Backtracking


0077	Combinations	Java Kotlin TypeScript C# Go Python	Medium	Backtracking	15	92.38
0046	Permutations	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08

Day 12 Dynamic Programming


0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00
0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Big_O_Time_O(n)_Space_O(n)	0	100.00
0120	Triangle	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming	1	99.79

Day 13 Bit Manipulation


0191	Number of 1 Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation	0	100.00

Day 14 Bit Manipulation


0190	Reverse Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer	0	100.00
0136	Single Number	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86

Algorithm II

Day 1 Binary Search


0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	100.00
0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	100.00

Day 2 Binary Search


0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00
0162	Find Peak Element	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Binary_Search, LeetCode_75_Binary_Search	0	100.00

Day 3 Two Pointers


0082	Remove Duplicates from Sorted List II	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List	0	100.00
0015	3Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02

Day 4 Two Pointers


0011	Container With Most Water	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, LeetCode_75_Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3	96.01

Day 5 Sliding Window


0209	Minimum Size Subarray Sum	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Prefix_Sum, Sliding_Window	1	99.76

Day 6 Breadth First Search Depth First Search


0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 7 Breadth First Search Depth First Search


0117	Populating Next Right Pointers in Each Node II	Java Kotlin TypeScript C# Go Python	Medium	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List	0	100.00

Day 8 Breadth First Search Depth First Search


0130	Surrounded Regions	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find	2	84.66

Day 9 Recursion Backtracking

Day 10 Recursion Backtracking


0039	Combination Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99

Day 11 Recursion Backtracking


0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, LeetCode_75_Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0022	Generate Parentheses	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0079	Word Search	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64	98.51

Day 12 Dynamic Programming


0055	Jump Game	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00

Day 13 Dynamic Programming


0045	Jump Game II	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 14 Dynamic Programming


0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 15 Dynamic Programming


0139	Word Break	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42

Day 16 Dynamic Programming


0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 17 Dynamic Programming

Day 18 Dynamic Programming


0072	Edit Distance	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, LeetCode_75_DP/Multidimensional, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0322	Coin Change	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 19 Bit Manipulation


0201	Bitwise AND of Numbers Range	Java Kotlin TypeScript C# Go Python	Medium	Bit_Manipulation	3	100.00

Day 20 Others

Day 21 Others


0202	Happy Number	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Hash_Table, Math, Two_Pointers	0	100.00
0149	Max Points on a Line	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, Array, Hash_Table, Math, Geometry	7	99.18

Binary Search I

Day 1

Day 2


0035	Search Insert Position	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 3

Day 4


0069	Sqrt(x)	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Math, Binary_Search	1	86.67

Day 5


0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 6

Day 7


0167	Two Sum II - Input Array Is Sorted	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Two_Pointers	2	92.62

Day 8


0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00

Day 9

Day 10

Day 11


0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00

Day 12


0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00

Binary Search II

Day 1


0209	Minimum Size Subarray Sum	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Prefix_Sum, Sliding_Window	1	99.76

Day 2

Day 3


0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 4

Day 5

Day 6

Day 7

Day 8

Day 9

Day 10


0222	Count Complete Tree Nodes	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Tree, Binary_Search, Binary_Tree	0	100.00

Day 11

Day 12


0162	Find Peak Element	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Binary_Search, LeetCode_75_Binary_Search	0	100.00

Day 13

Day 14

Day 15

Day 16

Day 17

Day 18

Day 19

Day 20

Dynamic Programming I

Day 1

Day 2


0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 3


0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Big_O_Time_O(n)_Space_O(n)	0	100.00

Day 4


0055	Jump Game	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	1	100.00
0045	Jump Game II	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 5


0053	Maximum Subarray	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Big_O_Time_O(n)_Space_O(1)	1	99.32
0918	Maximum Sum Circular Subarray	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Divide_and_Conquer, Queue, Monotonic_Queue	2	99.34

Day 6

Day 7


0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Big_O_Time_O(N)_Space_O(1)	1	99.78
0122	Best Time to Buy and Sell Stock II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Dynamic_Programming, Greedy	1	76.91

Day 8

Day 9


0139	Word Break	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0042	Trapping Rain Water	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Big_O_Time_O(n)_Space_O(1)	0	100.00

Day 10

Day 11

Day 12

Day 13


0120	Triangle	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming	1	99.79

Day 14

Day 15


0063	Unique Paths II	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix	0	100.00

Day 16


0064	Minimum Path Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0221	Maximal Square	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix, Big_O_Time_O(mn)_Space_O(mn)	6	97.07

Day 17


0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Big_O_Time_O(n)_Space_O(n)	7	97.82

Day 18


0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75

Day 19


0392	Is Subsequence	Java Kotlin TypeScript C# Go Python	Easy	String, Dynamic_Programming, Two_Pointers, LeetCode_75_Two_Pointers	1	93.13
0072	Edit Distance	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, LeetCode_75_DP/Multidimensional, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19

Day 20


0322	Coin Change	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59

Day 21

Programming Skills I

Day 1 Basic Data Type

Day 2 Operator


0191	Number of 1 Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation	0	100.00

Day 3 Conditional Statements

Day 4 Loop


0202	Happy Number	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Hash_Table, Math, Two_Pointers	0	100.00

Day 5 Function

Day 6 Array

Day 7 Array

Day 8 String

Day 9 String

Day 10 Linked List and Tree


0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Big_O_Time_O(N)_Space_O(H)	0	100.00

Day 11 Containers and Libraries


0242	Valid Anagram	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Sorting	2	97.76

Day 12 Class and Object

Programming Skills II

Day 1


0028	Implement strStr()	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers, String_Matching	0	100.00

Day 2

Day 3


0150	Evaluate Reverse Polish Notation	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Math, Stack	6	76.50
0066	Plus One	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Math	0	100.00

Day 4

Day 5


0067	Add Binary	Java Kotlin TypeScript C# Go Python	Easy	String, Math, Bit_Manipulation, Simulation	1	99.82

Day 6


0058	Length of Last Word	Java Kotlin TypeScript C# Go Python	Easy	String	0	100.00

Day 7


0048	Rotate Image	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00

Day 8


0054	Spiral Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation	0	100.00

Day 9

Day 10

Day 11


0049	Group Anagrams	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61

Day 12

Day 13

Day 14


0138	Copy List with Random Pointer	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00

Day 15


0002	Add Two Numbers	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task	1	100.00

Day 16


0061	Rotate List	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List	0	100.00
0173	Binary Search Tree Iterator	Java Kotlin TypeScript C# Go Python	Medium	Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator	15	100.00

Day 17

Day 18


0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Big_O_Time_O(1)_Space_O(N)	4	96.54

Day 19

Day 20


0380	Insert Delete GetRandom O(1)	Java Kotlin TypeScript C# Go Python	Medium	Array, Hash_Table, Math, Design, Randomized	27	93.44

Graph Theory I

Day 1 Matrix Related Problems


0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Big_O_Time_O(MN)_Space_O(MN)	3	87.24

Day 2 Matrix Related Problems

Day 3 Matrix Related Problems

Day 4 Matrix Related Problems

Day 5 Matrix Related Problems

Day 6 Matrix Related Problems

Day 7 Standard Traversal

Day 8 Standard Traversal

Day 9 Standard Traversal

Day 10 Standard Traversal

Day 11 Breadth First Search

Day 12 Breadth First Search


0433	Minimum Genetic Mutation	Java Kotlin TypeScript C# Go Python	Medium	String, Hash_Table, Breadth_First_Search	0	100.00
0127	Word Ladder	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, String, Hash_Table, Breadth_First_Search	22	96.00

Day 13 Graph Theory

Day 14 Graph Theory

Algorithms

#	Title	Language	Difficulty	Tag	Time, ms	Time, %
0918	Maximum Sum Circular Subarray	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Divide_and_Conquer, Queue, Monotonic_Queue, Dynamic_Programming_I_Day_5, Top_Interview_150_Kadane's_Algorithm	2	99.34
0909	Snakes and Ladders	Java Kotlin TypeScript C# Go Python	Medium	Array, Breadth_First_Search, Matrix, Top_Interview_150_Graph_BFS	4	95.81
0637	Average of Levels in Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Top_Interview_150_Binary_Tree_BFS	2	94.34
0530	Minimum Absolute Difference in BST	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Top_Interview_150_Binary_Search_Tree	0	100.00
0502	IPO	Java Kotlin TypeScript C# Go Python	Hard	Array, Sorting, Greedy, Heap_Priority_Queue, Top_Interview_150_Heap	64	97.22
0452	Minimum Number of Arrows to Burst Balloons	Java Kotlin TypeScript C# Go Python	Medium	Array, Sorting, Greedy, LeetCode_75_Intervals, Top_Interview_150_Intervals	52	89.91
0433	Minimum Genetic Mutation	Java Kotlin TypeScript C# Go Python	Medium	String, Hash_Table, Breadth_First_Search, Graph_Theory_I_Day_12_Breadth_First_Search, Top_Interview_150_Graph_BFS	0	100.00
0427	Construct Quad Tree	Java Kotlin TypeScript C# Go Python	Medium	Array, Tree, Matrix, Divide_and_Conquer, Top_Interview_150_Divide_and_Conquer	0	100.00
0399	Evaluate Division	Java Kotlin TypeScript C# Go Python	Medium	Array, Depth_First_Search, Breadth_First_Search, Graph, Union_Find, Shortest_Path, LeetCode_75_Graphs/DFS, Top_Interview_150_Graph_General	1	99.52
0392	Is Subsequence	Java Kotlin TypeScript C# Go Python	Easy	String, Dynamic_Programming, Two_Pointers, LeetCode_75_Two_Pointers, Dynamic_Programming_I_Day_19, Level_1_Day_2_String, Udemy_Two_Pointers, Top_Interview_150_Two_Pointers	1	93.13
0383	Ransom Note	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Counting, Data_Structure_I_Day_6_String, Top_Interview_150_Hashmap	1	99.10
0380	Insert Delete GetRandom O(1)	Java Kotlin TypeScript C# Go Python	Medium	Array, Hash_Table, Math, Design, Randomized, Programming_Skills_II_Day_20, Top_Interview_150_Array/String	27	93.44
0373	Find K Pairs with Smallest Sums	Java Kotlin TypeScript C# Go Python	Medium	Array, Heap_Priority_Queue, Top_Interview_150_Heap	27	90.23
0322	Coin Change	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Breadth_First_Search, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_20, Level_2_Day_12_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(m*n)_Space_O(amount)	12	92.59
0300	Longest Increasing Subsequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Binary_Search, Algorithm_II_Day_16_Dynamic_Programming, Binary_Search_II_Day_3, Dynamic_Programming_I_Day_18, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n*log_n)_Space_O(n)	3	95.75
0295	Find Median from Data Stream	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Sorting, Two_Pointers, Design, Heap_Priority_Queue, Data_Stream, Top_Interview_150_Heap, Big_O_Time_O(n*log_n)_Space_O(n)	83	99.56
0290	Word Pattern	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Data_Structure_II_Day_7_String, Top_Interview_150_Hashmap	0	100.00
0289	Game of Life	Java Kotlin TypeScript C# Go Python	Medium	Array, Matrix, Simulation, Top_Interview_150_Matrix	0	100.00
0274	H-Index	Java Kotlin TypeScript C# Go Python	Medium	Array, Sorting, Counting_Sort, Top_Interview_150_Array/String	0	100.00
0242	Valid Anagram	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Sorting, Data_Structure_I_Day_6_String, Programming_Skills_I_Day_11_Containers_and_Libraries, Udemy_Strings, Top_Interview_150_Hashmap	2	97.76
0238	Product of Array Except Self	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Prefix_Sum, LeetCode_75_Array/String, Data_Structure_II_Day_5_Array, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n^2)_Space_O(n)	1	99.66
0236	Lowest Common Ancestor of a Binary Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Data_Structure_II_Day_18_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_Space_O(n)	6	100.00
0230	Kth Smallest Element in a BST	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_II_Day_17_Tree, Level_2_Day_9_Binary_Search_Tree, Top_Interview_150_Binary_Search_Tree, Big_O_Time_O(n)_Space_O(n)	0	100.00
0228	Summary Ranges	Java Kotlin TypeScript C# Go Python	Easy	Array, Top_Interview_150_Intervals	0	100.00
0226	Invert Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Level_2_Day_6_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(n)_Space_O(n)	0	100.00
0224	Basic Calculator	Java Kotlin TypeScript C# Go Python	Hard	String, Math, Stack, Recursion, Top_Interview_150_Stack	2	96.52
0222	Count Complete Tree Nodes	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Tree, Binary_Search, Binary_Tree, Binary_Search_II_Day_10, Top_Interview_150_Binary_Tree_General	0	100.00
0221	Maximal Square	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(mn)_Space_O(mn)	6	97.07
0219	Contains Duplicate II	Java Kotlin TypeScript C# Go Python	Easy	Array, Hash_Table, Sliding_Window, Top_Interview_150_Hashmap	15	98.00
0215	Kth Largest Element in an Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Heap_Priority_Queue, Divide_and_Conquer, Quickselect, LeetCode_75_Heap/Priority_Queue, Data_Structure_II_Day_20_Heap_Priority_Queue, Top_Interview_150_Heap, Big_O_Time_O(n*log(n))_Space_O(log(n))	5	70.82
0212	Word Search II	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, Array, String, Matrix, Backtracking, Trie, Top_Interview_150_Trie	17	99.16
0211	Design Add and Search Words Data Structure	Java Kotlin TypeScript C# Go Python	Medium	String, Depth_First_Search, Design, Trie, Top_Interview_150_Trie	156	99.85
0210	Course Schedule II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Level_2_Day_11_Graph/BFS/DFS, Top_Interview_150_Graph_General	4	91.07
0209	Minimum Size Subarray Sum	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Prefix_Sum, Sliding_Window, Algorithm_II_Day_5_Sliding_Window, Binary_Search_II_Day_1, Top_Interview_150_Sliding_Window	1	99.76
0208	Implement Trie (Prefix Tree)	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Design, Trie, LeetCode_75_Trie, Level_2_Day_16_Design, Udemy_Trie_and_Heap, Top_Interview_150_Trie, Big_O_Time_O(word.length())_or_O(prefix.length())_Space_O(N)	32	95.05
0207	Course Schedule	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Graph, Topological_Sort, Top_Interview_150_Graph_General, Big_O_Time_O(N)_Space_O(N)	3	99.99
0205	Isomorphic Strings	Java Kotlin TypeScript C# Go Python	Easy	String, Hash_Table, Level_1_Day_2_String, Top_Interview_150_Hashmap	2	99.18
0202	Happy Number	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Hash_Table, Math, Two_Pointers, Algorithm_II_Day_21_Others, Programming_Skills_I_Day_4_Loop, Level_2_Day_1_Implementation/Simulation, Top_Interview_150_Hashmap	0	100.00
0201	Bitwise AND of Numbers Range	Java Kotlin TypeScript C# Go Python	Medium	Bit_Manipulation, Algorithm_II_Day_19_Bit_Manipulation, Top_Interview_150_Bit_Manipulation	3	100.00
0200	Number of Islands	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_6_Breadth_First_Search_Depth_First_Search, Graph_Theory_I_Day_1_Matrix_Related_Problems, Level_1_Day_9_Graph/BFS/DFS, Udemy_Graph, Top_Interview_150_Graph_General, Big_O_Time_O(MN)_Space_O(MN)	3	87.24
0199	Binary Tree Right Side View	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/BFS, Data_Structure_II_Day_16_Tree, Level_2_Day_15_Tree, Top_Interview_150_Binary_Tree_BFS	0	100.00
0198	House Robber	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, LeetCode_75_DP/1D, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_3, Level_2_Day_12_Dynamic_Programming, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n)_Space_O(n)	0	100.00
0191	Number of 1 Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation, Algorithm_I_Day_13_Bit_Manipulation, Programming_Skills_I_Day_2_Operator, Udemy_Bit_Manipulation, Top_Interview_150_Bit_Manipulation	0	100.00
0190	Reverse Bits	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Bit_Manipulation, Divide_and_Conquer, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Bit_Manipulation, Top_Interview_150_Bit_Manipulation	0	100.00
0189	Rotate Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Two_Pointers, Algorithm_I_Day_2_Two_Pointers, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0	100.00
0188	Best Time to Buy and Sell Stock IV	Java Kotlin TypeScript C# Go Python	Hard	Array, Dynamic_Programming, Top_Interview_150_Multidimensional_DP	1	99.73
0173	Binary Search Tree Iterator	Java Kotlin TypeScript C# Go Python	Medium	Tree, Binary_Tree, Stack, Design, Binary_Search_Tree, Iterator, Data_Structure_II_Day_17_Tree, Programming_Skills_II_Day_16, Level_2_Day_9_Binary_Search_Tree, Top_Interview_150_Binary_Tree_General	15	100.00
0172	Factorial Trailing Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math, Udemy_Integers, Top_Interview_150_Math	0	100.00
0169	Majority Element	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Sorting, Counting, Divide_and_Conquer, Data_Structure_II_Day_1_Array, Udemy_Famous_Algorithm, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	1	99.89
0167	Two Sum II - Input Array Is Sorted	Java Kotlin TypeScript C# Go Python	Medium	Array, Binary_Search, Two_Pointers, Algorithm_I_Day_3_Two_Pointers, Binary_Search_I_Day_7, Top_Interview_150_Two_Pointers	2	92.62
0162	Find Peak Element	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Binary_Search, LeetCode_75_Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_II_Day_12, Top_Interview_150_Binary_Search	0	100.00
0155	Min Stack	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Stack, Design, Data_Structure_II_Day_14_Stack_Queue, Programming_Skills_II_Day_18, Level_2_Day_16_Design, Udemy_Design, Top_Interview_150_Stack, Big_O_Time_O(1)_Space_O(N)	4	96.54
0153	Find Minimum in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Algorithm_II_Day_2_Binary_Search, Binary_Search_I_Day_12, Udemy_Binary_Search, Top_Interview_150_Binary_Search, Big_O_Time_O(log_N)_Space_O(log_N)	0	100.00
0151	Reverse Words in a String	Java Kotlin TypeScript C# Go Python	Medium	String, Two_Pointers, LeetCode_75_Array/String, Udemy_Strings, Top_Interview_150_Array/String	2	99.69
0150	Evaluate Reverse Polish Notation	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Math, Stack, Programming_Skills_II_Day_3, Top_Interview_150_Stack	6	76.50
0149	Max Points on a Line	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, Array, Hash_Table, Math, Geometry, Algorithm_II_Day_21_Others, Top_Interview_150_Math	7	99.18
0148	Sort List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Sorting, Two_Pointers, Linked_List, Divide_and_Conquer, Merge_Sort, Level_2_Day_4_Linked_List, Top_Interview_150_Divide_and_Conquer, Big_O_Time_O(log(N))_Space_O(log(N))	9	93.90
0146	LRU Cache	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Design, Linked_List, Doubly_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(1)_Space_O(capacity)	40	98.20
0141	Linked List Cycle	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Two_Pointers, Linked_List, Data_Structure_I_Day_7_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(N)_Space_O(1)	0	100.00
0139	Word Break	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Dynamic_Programming, Trie, Memoization, Algorithm_II_Day_15_Dynamic_Programming, Dynamic_Programming_I_Day_9, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(M+max*N)_Space_O(M+N+max)	1	99.42
0138	Copy List with Random Pointer	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Hash_Table, Linked_List, Programming_Skills_II_Day_14, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(N)_Space_O(N)	0	100.00
0137	Single Number II	Java Kotlin TypeScript C# Go Python	Medium	Array, Bit_Manipulation, Top_Interview_150_Bit_Manipulation	0	100.00
0136	Single Number	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Bit_Manipulation, LeetCode_75_Bit_Manipulation, Data_Structure_II_Day_1_Array, Algorithm_I_Day_14_Bit_Manipulation, Udemy_Integers, Top_Interview_150_Bit_Manipulation, Big_O_Time_O(N)_Space_O(1)	1	99.86
0135	Candy	Java Kotlin TypeScript C# Go Python	Hard	Array, Greedy, Top_Interview_150_Array/String	3	83.95
0134	Gas Station	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Greedy, Top_Interview_150_Array/String	2	97.52
0133	Clone Graph	Java Kotlin TypeScript C# Go Python	Medium	Hash_Table, Depth_First_Search, Breadth_First_Search, Graph, Udemy_Graph, Top_Interview_150_Graph_General	25	68.87
0130	Surrounded Regions	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Depth_First_Search, Breadth_First_Search, Matrix, Union_Find, Algorithm_II_Day_8_Breadth_First_Search_Depth_First_Search, Top_Interview_150_Graph_General	2	84.66
0129	Sum Root to Leaf Numbers	Java Kotlin TypeScript C# Go Python	Medium	Depth_First_Search, Tree, Binary_Tree, Top_Interview_150_Binary_Tree_General	0	100.00
0128	Longest Consecutive Sequence	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Union_Find, Top_Interview_150_Hashmap, Big_O_Time_O(N_log_N)_Space_O(1)	14	98.89
0127	Word Ladder	Java Kotlin TypeScript C# Go Python	Hard	Top_Interview_Questions, String, Hash_Table, Breadth_First_Search, Graph_Theory_I_Day_12_Breadth_First_Search, Top_Interview_150_Graph_BFS	22	96.00
0125	Valid Palindrome	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers, Udemy_Two_Pointers, Top_Interview_150_Two_Pointers	2	99.11
0124	Binary Tree Maximum Path Sum	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Depth_First_Search, Tree, Binary_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	0	100.00
0123	Best Time to Buy and Sell Stock III	Java Kotlin TypeScript C# Go Python	Hard	Array, Dynamic_Programming, Top_Interview_150_Multidimensional_DP	4	74.67
0122	Best Time to Buy and Sell Stock II	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Dynamic_Programming_I_Day_7, Udemy_Arrays, Top_Interview_150_Array/String	1	76.91
0121	Best Time to Buy and Sell Stock	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Data_Structure_I_Day_3_Array, Dynamic_Programming_I_Day_7, Level_1_Day_5_Greedy, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(N)_Space_O(1)	1	99.78
0120	Triangle	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_13, Udemy_Dynamic_Programming, Top_Interview_150_Multidimensional_DP	1	99.79
0117	Populating Next Right Pointers in Each Node II	Java Kotlin TypeScript C# Go Python	Medium	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Linked_List, Algorithm_II_Day_7_Breadth_First_Search_Depth_First_Search, Top_Interview_150_Binary_Tree_General	0	100.00
0114	Flatten Binary Tree to Linked List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Depth_First_Search, Tree, Binary_Tree, Stack, Linked_List, Udemy_Linked_List, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	0	100.00
0112	Path Sum	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_12_Tree, Top_Interview_150_Binary_Tree_General	0	100.00
0108	Convert Sorted Array to Binary Search Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Tree, Binary_Tree, Binary_Search_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Level_2_Day_9_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Divide_and_Conquer	0	100.00
0106	Construct Binary Tree from Inorder and Postorder Traversal	Java Kotlin TypeScript C# Go Python	Medium	Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Top_Interview_150_Binary_Tree_General	0	100.00
0105	Construct Binary Tree from Preorder and Inorder Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Tree, Binary_Tree, Divide_and_Conquer, Data_Structure_II_Day_15_Tree, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(N)	1	96.33
0104	Maximum Depth of Binary Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, LeetCode_75_Binary_Tree/DFS, Data_Structure_I_Day_11_Tree, Programming_Skills_I_Day_10_Linked_List_and_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(H)	0	100.00
0103	Binary Tree Zigzag Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_II_Day_15_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_BFS	0	100.00
0102	Binary Tree Level Order Traversal	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_1_Day_6_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_BFS, Big_O_Time_O(N)_Space_O(N)	1	91.19
0101	Symmetric Tree	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Data_Structure_I_Day_11_Tree, Level_2_Day_15_Tree, Top_Interview_150_Binary_Tree_General, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0100	Same Tree	Java Kotlin TypeScript C# Go Python	Easy	Depth_First_Search, Breadth_First_Search, Tree, Binary_Tree, Level_2_Day_15_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Tree_General	0	100.00
0098	Validate Binary Search Tree	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Depth_First_Search, Tree, Binary_Tree, Binary_Search_Tree, Data_Structure_I_Day_14_Tree, Level_1_Day_8_Binary_Search_Tree, Udemy_Tree_Stack_Queue, Top_Interview_150_Binary_Search_Tree, Big_O_Time_O(N)_Space_O(log(N))	0	100.00
0097	Interleaving String	Java Kotlin TypeScript C# Go Python	Medium	String, Dynamic_Programming, Top_Interview_150_Multidimensional_DP	0	100.00
0092	Reverse Linked List II	Java Kotlin TypeScript C# Go Python	Medium	Linked_List, Top_Interview_150_Linked_List	0	100.00
0088	Merge Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_I_Day_2_Array, Top_Interview_150_Array/String	0	100.00
0086	Partition List	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List, Top_Interview_150_Linked_List	0	100.00
0082	Remove Duplicates from Sorted List II	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List, Data_Structure_II_Day_11_Linked_List, Algorithm_II_Day_3_Two_Pointers, Top_Interview_150_Linked_List	0	100.00
0080	Remove Duplicates from Sorted Array II	Java Kotlin TypeScript C# Go Python	Medium	Array, Two_Pointers, Udemy_Arrays, Top_Interview_150_Array/String	0	100.00
0079	Word Search	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Top_Interview_150_Backtracking, Big_O_Time_O(4^(mn))_Space_O(mn)	64	98.51
0077	Combinations	Java Kotlin TypeScript C# Go Python	Medium	Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Top_Interview_150_Backtracking	15	92.38
0076	Minimum Window Substring	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Top_Interview_150_Sliding_Window, Big_O_Time_O(s.length())_Space_O(1)	2	99.83
0074	Search a 2D Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Binary_Search, Matrix, Data_Structure_I_Day_5_Array, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_8, Level_2_Day_8_Binary_Search, Udemy_2D_Arrays/Matrix, Top_Interview_150_Binary_Search, Big_O_Time_O(endRow+endCol)_Space_O(1)	0	100.00
0073	Set Matrix Zeroes	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Matrix, Udemy_2D_Arrays/Matrix, Top_Interview_150_Matrix, Big_O_Time_O(m*n)_Space_O(1)	0	100.00
0072	Edit Distance	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, String, Dynamic_Programming, LeetCode_75_DP/Multidimensional, Algorithm_II_Day_18_Dynamic_Programming, Dynamic_Programming_I_Day_19, Udemy_Dynamic_Programming, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(n^2)_Space_O(n2)	3	97.19
0071	Simplify Path	Java Kotlin TypeScript C# Go Python	Medium	String, Stack, Top_Interview_150_Stack	2	99.86
0070	Climbing Stairs	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Dynamic_Programming, Math, Memoization, Algorithm_I_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_2, Level_1_Day_10_Dynamic_Programming, Udemy_Dynamic_Programming, Top_Interview_150_1D_DP, Big_O_Time_O(n)_Space_O(n)	0	100.00
0069	Sqrt(x)	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Math, Binary_Search, Binary_Search_I_Day_4, Top_Interview_150_Math	1	86.67
0068	Text Justification	Java Kotlin TypeScript C# Go Python	Hard	Array, String, Simulation, Top_Interview_150_Array/String	0	100.00
0067	Add Binary	Java Kotlin TypeScript C# Go Python	Easy	String, Math, Bit_Manipulation, Simulation, Programming_Skills_II_Day_5, Top_Interview_150_Bit_Manipulation	1	99.82
0066	Plus One	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Math, Programming_Skills_II_Day_3, Udemy_Arrays, Top_Interview_150_Math	0	100.00
0064	Minimum Path Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_16, Udemy_Dynamic_Programming, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(mn)_Space_O(mn)	1	99.73
0063	Unique Paths II	Java Kotlin TypeScript C# Go Python	Medium	Array, Dynamic_Programming, Matrix, Dynamic_Programming_I_Day_15, Top_Interview_150_Multidimensional_DP	0	100.00
0061	Rotate List	Java Kotlin TypeScript C# Go Python	Medium	Two_Pointers, Linked_List, Programming_Skills_II_Day_16, Udemy_Linked_List, Top_Interview_150_Linked_List	0	100.00
0058	Length of Last Word	Java Kotlin TypeScript C# Go Python	Easy	String, Programming_Skills_II_Day_6, Udemy_Arrays, Top_Interview_150_Array/String	0	100.00
0057	Insert Interval	Java Kotlin TypeScript C# Go Python	Medium	Array, Level_2_Day_17_Interval, Top_Interview_150_Intervals	0	100.00
0056	Merge Intervals	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Data_Structure_II_Day_2_Array, Level_2_Day_17_Interval, Udemy_2D_Arrays/Matrix, Top_Interview_150_Intervals, Big_O_Time_O(n_log_n)_Space_O(n)	7	98.37
0055	Jump Game	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_12_Dynamic_Programming, Dynamic_Programming_I_Day_4, Udemy_Arrays, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	1	100.00
0054	Spiral Matrix	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Matrix, Simulation, Programming_Skills_II_Day_8, Level_2_Day_1_Implementation/Simulation, Udemy_2D_Arrays/Matrix, Top_Interview_150_Matrix	0	100.00
0053	Maximum Subarray	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Divide_and_Conquer, Data_Structure_I_Day_1_Array, Dynamic_Programming_I_Day_5, Udemy_Famous_Algorithm, Top_Interview_150_Kadane's_Algorithm, Big_O_Time_O(n)_Space_O(1)	1	99.32
0052	N-Queens II	Java Kotlin TypeScript C# Go Python	Hard	Backtracking, Top_Interview_150_Backtracking	0	100.00
0050	Pow(x, n)	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Math, Recursion, Udemy_Integers, Top_Interview_150_Math	0	100.00
0049	Group Anagrams	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, String, Hash_Table, Sorting, Data_Structure_II_Day_8_String, Programming_Skills_II_Day_11, Udemy_Strings, Top_Interview_150_Hashmap, Big_O_Time_O(n*k_log_k)_Space_O(n)	6	97.61
0048	Rotate Image	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Math, Matrix, Data_Structure_II_Day_3_Array, Programming_Skills_II_Day_7, Udemy_2D_Arrays/Matrix, Top_Interview_150_Matrix, Big_O_Time_O(n^2)_Space_O(1)	0	100.00
0046	Permutations	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Backtracking, Algorithm_I_Day_11_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(n*n!)_Space_O(n+n!)	1	94.08
0045	Jump Game II	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Dynamic_Programming, Greedy, Algorithm_II_Day_13_Dynamic_Programming, Dynamic_Programming_I_Day_4, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0	100.00
0042	Trapping Rain Water	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Dynamic_Programming, Two_Pointers, Stack, Monotonic_Stack, Dynamic_Programming_I_Day_9, Udemy_Two_Pointers, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	0	100.00
0039	Combination Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Array, Backtracking, Algorithm_II_Day_10_Recursion_Backtracking, Level_2_Day_20_Brute_Force/Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(2^n)_Space_O(n+2^n)	1	99.99
0036	Valid Sudoku	Java Kotlin TypeScript C# Go Python	Medium	Top_Interview_Questions, Array, Hash_Table, Matrix, Data_Structure_I_Day_5_Array, Top_Interview_150_Matrix	1	100.00
0035	Search Insert Position	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Array, Binary_Search, Algorithm_I_Day_1_Binary_Search, Binary_Search_I_Day_2, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0034	Find First and Last Position of Element in Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_5, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0033	Search in Rotated Sorted Array	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Algorithm_II_Day_1_Binary_Search, Binary_Search_I_Day_11, Level_2_Day_8_Binary_Search, Udemy_Binary_Search, Top_Interview_150_Binary_Search, Big_O_Time_O(log_n)_Space_O(1)	0	100.00
0030	Substring with Concatenation of All Words	Java Kotlin TypeScript C# Go Python	Hard	String, Hash_Table, Sliding_Window, Top_Interview_150_Sliding_Window	11	97.43
0028	Implement strStr()	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Two_Pointers, String_Matching, Programming_Skills_II_Day_1, Top_Interview_150_Array/String	0	100.00
0027	Remove Element	Java Kotlin TypeScript C# Go Python	Easy	Array, Two_Pointers, Top_Interview_150_Array/String	0	100.00
0026	Remove Duplicates from Sorted Array	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, Array, Two_Pointers, Udemy_Two_Pointers, Top_Interview_150_Array/String	0	100.00
0025	Reverse Nodes in k-Group	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Linked_List, Recursion, Data_Structure_II_Day_13_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(n)_Space_O(k)	0	100.00
0023	Merge k Sorted Lists	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Heap_Priority_Queue, Linked_List, Divide_and_Conquer, Merge_Sort, Top_Interview_150_Divide_and_Conquer, Big_O_Time_O(knlog(k))_Space_O(log(k))	1	99.86
0022	Generate Parentheses	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(2^n)_Space_O(n)	0	100.00
0021	Merge Two Sorted Lists	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Linked_List, Recursion, Data_Structure_I_Day_7_Linked_List, Algorithm_I_Day_10_Recursion_Backtracking, Level_1_Day_3_Linked_List, Udemy_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(m+n)_Space_O(m+n)	0	100.00
0020	Valid Parentheses	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, String, Stack, Data_Structure_I_Day_9_Stack_Queue, Udemy_Strings, Top_Interview_150_Stack, Big_O_Time_O(n)_Space_O(n)	2	97.19
0019	Remove Nth Node From End of List	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Two_Pointers, Linked_List, Algorithm_I_Day_5_Two_Pointers, Level_2_Day_3_Linked_List, Top_Interview_150_Linked_List, Big_O_Time_O(L)_Space_O(L)	0	100.00
0017	Letter Combinations of a Phone Number	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Backtracking, LeetCode_75_Backtracking, Algorithm_II_Day_11_Recursion_Backtracking, Udemy_Backtracking/Recursion, Top_Interview_150_Backtracking, Big_O_Time_O(4^n)_Space_O(n)	0	100.00
0015	3Sum	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Sorting, Two_Pointers, Data_Structure_II_Day_1_Array, Algorithm_II_Day_3_Two_Pointers, Udemy_Two_Pointers, Top_Interview_150_Two_Pointers, Big_O_Time_O(n*log(n))_Space_O(n^2)	29	72.02
0014	Longest Common Prefix	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Level_2_Day_2_String, Udemy_Strings, Top_Interview_150_Array/String, Big_O_Time_O(n*m)_Space_O(m)	0	100.00
0013	Roman to Integer	Java Kotlin TypeScript C# Go Python	Easy	Top_Interview_Questions, String, Hash_Table, Math, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(1)	2	100.00
0012	Integer to Roman	Java Kotlin TypeScript C# Go Python	Medium	String, Hash_Table, Math, Top_Interview_150_Array/String, Big_O_Time_O(1)_Space_O(1)	2	100.00
0011	Container With Most Water	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Array, Greedy, Two_Pointers, LeetCode_75_Two_Pointers, Algorithm_II_Day_4_Two_Pointers, Top_Interview_150_Two_Pointers, Big_O_Time_O(n)_Space_O(1)	3	96.01
0009	Palindrome Number	Java Kotlin TypeScript C# Go Python	Easy	Math, Udemy_Integers, Top_Interview_150_Math, Big_O_Time_O(log10(x))_Space_O(1)	4	100.00
0006	Zigzag Conversion	Java Kotlin TypeScript C# Go Python	Medium	String, Top_Interview_150_Array/String, Big_O_Time_O(n)_Space_O(n)	2	99.71
0005	Longest Palindromic Substring	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Dynamic_Programming, Data_Structure_II_Day_9_String, Algorithm_II_Day_14_Dynamic_Programming, Dynamic_Programming_I_Day_17, Udemy_Strings, Top_Interview_150_Multidimensional_DP, Big_O_Time_O(n)_Space_O(n)	7	97.82
0004	Median of Two Sorted Arrays	Java Kotlin TypeScript C# Go Python	Hard	Top_100_Liked_Questions, Top_Interview_Questions, Array, Binary_Search, Divide_and_Conquer, Top_Interview_150_Binary_Search, Big_O_Time_O(log(min(N,M)))_Space_O(1), AI_can_be_used_to_solve_the_task	1	100.00
0003	Longest Substring Without Repeating Characters	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, String, Hash_Table, Sliding_Window, Algorithm_I_Day_6_Sliding_Window, Level_2_Day_14_Sliding_Window/Two_Pointer, Udemy_Strings, Top_Interview_150_Sliding_Window, Big_O_Time_O(n)_Space_O(1), AI_can_be_used_to_solve_the_task	2	98.59
0002	Add Two Numbers	Java Kotlin TypeScript C# Go Python	Medium	Top_100_Liked_Questions, Top_Interview_Questions, Math, Linked_List, Recursion, Data_Structure_II_Day_10_Linked_List, Programming_Skills_II_Day_15, Top_Interview_150_Linked_List, Big_O_Time_O(max(N,M))_Space_O(max(N,M)), AI_can_be_used_to_solve_the_task	1	100.00
0001	Two Sum	Java Kotlin TypeScript C# Go Python	Easy	Top_100_Liked_Questions, Top_Interview_Questions, Array, Hash_Table, Data_Structure_I_Day_2_Array, Level_1_Day_13_Hashmap, Udemy_Arrays, Top_Interview_150_Hashmap, Big_O_Time_O(n)_Space_O(n), AI_can_be_used_to_solve_the_task	2	98.90

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SQL I

Day 1 Select

Day 2 Select and Order

Day 3 String Processing Functions

Day 4 Union and Select

Day 5 Union

Day 6 Union

Day 7 Function

Day 8 Function

Day 9 Control of Flow

Day 10 Where

Level 1

Day 1 Prefix Sum

Day 2 String

Day 3 Linked List

Day 4 Linked List

Day 5 Greedy

Day 6 Tree

Day 7 Binary Search

Day 8 Binary Search Tree

Day 9 Graph/BFS/DFS

Day 10 Dynamic Programming

Day 11 Dynamic Programming

Day 12 Sliding Window/Two Pointer

Day 13 Hashmap

Day 14 Stack

Day 15 Heap

Level 2

Day 1 Implementation/Simulation

Day 2 String

Day 3 Linked List

Day 4 Linked List

Day 5 Greedy

Day 6 Tree

Day 7 Tree

Day 8 Binary Search

Day 9 Binary Search Tree

Day 10 Graph/BFS/DFS

Day 11 Graph/BFS/DFS

Day 12 Dynamic Programming

Day 13 Dynamic Programming

Day 14 Sliding Window/Two Pointer

Day 15 Tree

Day 16 Design

Day 17 Interval

Day 18 Stack

Day 19 Union Find

Day 20 Brute Force/Backtracking

Udemy

Udemy Integers

Udemy Strings

Udemy Binary Search

Udemy Arrays

Udemy Two Pointers

Udemy Famous Algorithm

Udemy Sorting Algorithms

Udemy 2D Arrays/Matrix

Udemy Linked List

Udemy Tree Stack Queue

Udemy Trie and Heap

Udemy Graph

Udemy Dynamic Programming

Udemy Backtracking/Recursion

Udemy Bit Manipulation

Udemy Design

Top Interview 150

Top Interview 150 Array/String

Top Interview 150 Two Pointers

Top Interview 150 Sliding Window

Top Interview 150 Matrix

Top Interview 150 Hashmap

Top Interview 150 Intervals

Top Interview 150 Stack

Top Interview 150 Linked List