LeetCode Python Solutions

This repository contains clean and efficient Python solutions for a wide range of LeetCode coding interview problems including arrays, strings, dynamic programming, trees, graphs, and more.

Perfect for:

• Interview preparation
• Learning algorithms and data structures
• Practicing coding problems in Python

#	Problem	LeetCode Link	Solution File
1	1010 Pairs Of Songs With Total Durations Divisible By 60	Link	1010_Pairs_of_Songs_With_Total_Durations_Divisible_by_60.py
2	102 Binary Tree Level Order Traversal	Link	102_Binary_Tree_Level_Order_Traversal.py
3	104. Maximum Depth Of Binary Tree - Iterative Dfs	Link	104.Maximum_Depth_of_Binary_Tree-_Iterative_DFS.py
4	104 Maximum Depth Of Binary Tree Bfs	Link	104_Maximum_Depth_of_Binary_Tree_BFS.py
5	1051 Height Checker	Link	1051_Height_Checker.py
6	108. Convert Sorted Array To Binary Search Tree	Link	108._Convert_Sorted_Array_to_Binary_Search_Tree.py
7	1108. Defanging An Ip Address	Link	1108._Defanging_an_IP_Address.py
8	1119. Remove Vowels From A String	Link	1119._Remove_Vowels_from_a_String.py
9	1137. N-Th Tribonacci Number	Link	1137._N-th_Tribonacci_Number.py
10	1143. Longest Common Subsequence - Approach 1 - Top Down Memonization	Link	1143.Longest_Common_Subsequence-Approach_1-_Top_down_memonization.py
11	1143. Longest Common Subsequence - Tabulation	Link	1143.Longest_Common_Subsequence-_Tabulation.py
12	118. Pascal'S Triangle	Link	118._Pascal's_Triangle.py
13	11 Container With Most Water	Link	11_Container_With_Most_Water.py
14	121. Best Time To Buy And Sell Stock	Link	121._Best_Time_to_Buy_and_Sell_Stock.py
15	122. Best Time To Buy And Sell Stock Ii	Link	122._Best_Time_to_Buy_and_Sell_Stock_II.py
16	125. Valid Palindrome	Link	125._Valid_Palindrome.py
17	1291. Sequential Digits	Link	1291._Sequential_Digits.py
18	136. Single Number	Link	136._Single_Number.py
19	1365. How Many Numbers Are Smaller Than The Current Number	Link	1365._How_Many_Numbers_Are_Smaller_Than_the_Current_Number.py
20	146. Lru Cache	Link	146._LRU_Cache.py
21	1480. Running Sum Of 1D Array	Link	1480._Running_Sum_of_1d_Array.py
22	1512. Number Of Good Pairs	Link	1512._Number_of_Good_Pairs.py
23	1570. Dot Product Of Two Sparse Vectors	Link	1570._Dot_Product_of_Two_Sparse_Vectors.py
24	167. Two Sum Ii - Input Array Is Sorted	Link	167.Two_Sum_II-_Input_Array_Is_Sorted.py
25	172. Factorial Trailing Zeroes	Link	172._Factorial_Trailing_Zeroes.py
26	1768. Merge Strings Alternately	Link	1768._Merge_Strings_Alternately.py
27	1796 Second Largest Digit In A String	Link	1796_Second_Largest_Digit_in_a_String.py
28	1832. Check If The Sentence Is Pangram	Link	1832._Check_if_the_Sentence_Is_Pangram.py
29	1 Two Sum	Link	1_Two_Sum.py
30	20. Valid Parentheses	Link	20._Valid_Parentheses.py
31	200. Number Of Islands	Link	200._Number_of_Islands.py
32	2016. Maximum Difference Between Increasing Elements	Link	2016._Maximum_Difference_Between_Increasing_Elements.py
33	206. Reverse Linked List	Link	206._Reverse_Linked_List.py
34	21. Merge Two Sorted Lists - Simple Solutiona	Link	21.Merge_Two_Sorted_Lists-_Simple_SolutionA.py
35	21. Merge Two Sorted Lists - Two Pointers	Link	21.Merge_Two_Sorted_Lists-_two_pointers.py
36	2130. Maximum Twin Sum Of A Linked List	Link	2130._Maximum_Twin_Sum_of_a_Linked_List.py
37	2149. Rearrange Array Elements By Sign	Link	2149._Rearrange_Array_Elements_by_Sign.py
38	215. Kth Largest Element In An Array	Link	215._Kth_Largest_Element_in_an_Array.py
39	215. Kth Largest Element In An Array - Using Sorting	Link	215.Kth_Largest_Element_in_an_Array-_Using_Sorting.py
40	2161. Partition Array According To Given Pivot	Link	2161._Partition_Array_According_to_Given_Pivot.py
41	217. Contains Duplicate	Link	217._Contains_Duplicate.py
42	2235. Add Two Integers	Link	2235._Add_Two_Integers.py
43	23. Merge K Sorted Lists - Using Heap	Link	23.Merge_k_Sorted_Lists-_Using_Heap.py
44	237. Delete Node In A Linked List	Link	237._Delete_Node_in_a_Linked_List.py
45	24. Swap Nodes In Pairs	Link	24._Swap_Nodes_in_Pairs.py
46	240. Search A 2D Matrix Ii	Link	240._Search_a_2D_Matrix_II.py
47	242. Valid Anagram	Link	242._Valid_Anagram.py
48	252. Meeting Rooms	Link	252._Meeting_Rooms.py
49	2667. Create Hello World Function	Link	2667._Create_Hello_World_Function.py
50	278. First Bad Version	Link	278._First_Bad_Version.py
51	2877. Create A Dataframe From List	Link	2877._Create_a_DataFrame_from_List.py
52	3024 Type Of Triangle	Link	3024_Type_of_Triangle.py
53	3110. Score Of A String	Link	3110._Score_of_a_String.py
54	322. Coin Change	Link	322._Coin_Change.py
55	326. Power Of Three - With Loop	Link	326.Power_of_Three-_with_loop.py
56	33. Search In Rotated Sorted Array	Link	33._Search_in_Rotated_Sorted_Array.py
57	34. Find First And Last Position Of Element In Sorted Array	Link	34._Find_First_and_Last_Position_of_Element_in_Sorted_Array.py
58	344. Reverse String	Link	344._Reverse_String.py
59	346. Moving Average From Data Stream	Link	346._Moving_Average_from_Data_Stream.py
60	347. Top K Frequent Elements	Link	347._Top_K_Frequent_Elements.py
61	350. Intersection Of Two Arrays Ii	Link	350._Intersection_of_Two_Arrays_II.py
62	36. Valid Sudoku	Link	36._Valid_Sudoku.py
63	374. Guess Number Higher Or Lower	Link	374._Guess_Number_Higher_or_Lower.py
64	387. First Unique Character In A String	Link	387._First_Unique_Character_in_a_String.py
65	4. Median Of Two Sorted Arrays	Link	4._Median_of_Two_Sorted_Arrays.py
66	41. First Missing Positive	Link	41._First_Missing_Positive.py
67	42. Trapping Rain Water	Link	42._Trapping_Rain_Water.py
68	451. Sort Characters By Frequency	Link	451._Sort_Characters_By_Frequency.py
69	46. Permutations	Link	46._Permutations.py
70	48. Rotate Image	Link	48._Rotate_Image.py
71	509. Fibonacci Number	Link	509._Fibonacci_Number.py
72	518. Coin Change 2	Link	518._Coin_Change_2.py
73	54. Spiral Matrix	Link	54._Spiral_Matrix.py
74	551. Student Attendance Record I	Link	551._Student_Attendance_Record_I.py
75	56. Merge Intervals	Link	56._Merge_Intervals.py
76	62. Unique Paths	Link	62._Unique_Paths.py
77	653. Two Sum Iv - Input Is A Bst	Link	653.Two_Sum_IV-_Input_is_a_BST.py
78	69. Sqrt(X)	Link	69._Sqrt(x).py
79	7. Reverse Integer	Link	7._Reverse_Integer.py
80	70. Climbing Stairs	Link	70._Climbing_Stairs.py
81	704. Binary Search	Link	704._Binary_Search.py
82	724. Find Pivot Index	Link	724._Find_Pivot_Index.py
83	73. Set Matrix Zeroes	Link	73._Set_Matrix_Zeroes.py
84	74. Search A 2D Matrix	Link	74._Search_a_2D_Matrix.py
85	75. Sort Colors	Link	75._Sort_Colors.py
86	78. Subsets	Link	78._Subsets.py
87	797. All Paths From Source To Target	Link	797._All_Paths_From_Source_to_Target.py
88	867. Transpose Matrix	Link	867._Transpose_Matrix.py
89	88. Merge Sorted Array	Link	88._Merge_Sorted_Array.py
90	994. Rotting Oranges	Link	994._Rotting_Oranges.py