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

Take a for loop.
reverse each row using while loop.
After reversing now traverse the row again and invert the value.
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;
    }
}

Blog

Flipping an Image(leetcode)

Tahzib Mahmud Rifat

INTRODUCTION

Examples

Steps

JavaCode

Output

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