Flipping an Image(leetcode)

INTRODUCTION

Our problem says, we are given an 2D array. At first we have to reverse each row of the array, then we have to invert(if 0 then set 1, if the value is 1 then set 0) all the elements of the array.

Examples

Steps

1. Take a for loop.
2. reverse each row using while loop.
3. After reversing now traverse the row again and invert the value.
4. In the end return the array.

JavaCode

class Solution {
    public int[][] flipAndInvertImage(int[][] image) {
        for(int i = 0; i<image.length; i++){
            int temp = 0, j = 0, k= image[i].length-1;
            while(j < k){
                temp = image[i][j];
                image[i][j] = image[i][k];
                image[i][k] = temp;
                j++;
                k--;
            }

            for(int l = 0; l<image[i].length; l++){
                if(image[i][l] == 1){
                    image[i][l] = 0;
                }else{
                    image[i][l] = 1;
                }
            }
        }
        return image;
    }
}

Output