Merge pull request PawanJaiswal08#18 from kishanrajput23/newcodes

Added 268.Missing_Number.java

Author: PawanJaiswal08

268.Missing_Number.java

@@ -0,0 +1,10 @@
+class Solution {
+    public int missingNumber(int[] nums) {
+        int n = nums.length;
+        int sum = (n * (n+1)) / 2;
+        for(int i=0; i<n; i++) {
+            sum -= nums[i];
+        }
+        return sum;
+    }
+}

832.Flipping_an_Image.java

@@ -0,0 +1,15 @@
+class Solution {
+    public int[][] flipAndInvertImage(int[][] image) {
+        for(int i=0;i<image.length;i++){
+            int low = 0;
+            int high = image.length-1;
+            while(low<=high){
+                if(image[i][low]==image[i][high])
+                    image[i][low]=image[i][high] = 1-image[i][low];
+                low++;
+                high--;
+            }
+        }
+        return image;
+    }
+}