anti-diagonal-traversal-of-matrix.java

class Solution
{
    public int[] antiDiagonalPattern(int[][] matrix)
    {
        // Code here
        int n = matrix.length, k=0, x=0;
        int arr[] = new int[n*n];
        
        for(int i=0; i<n; i++){
            k=0;
            for(int j=i; j>=0; j--) arr[x++] = matrix[k++][j];
        }
        
        for(int i=1; i<n; i++){
            k=i;
            for(int j=n-1; j>=i; j--) arr[x++] = matrix[k++][j];
        }
        
        return arr;

    }
}