LeetCode-Set Matrix Zeroes

Posted 2020-08-11 IncredibleThings

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

public class Solution {
    public void setZeroes(int[][] matrix) {
        if(matrix==null){
            return;
        }
        int m=matrix.length;
        int n=matrix[0].length;
        
        List<Integer> r=new ArrayList<Integer>();
        List<Integer> c=new ArrayList<Integer>();
        for(int i=0; i<m; i++){
            for(int j=0; j<n; j++){
                if(matrix[i][j]==0){
                    r.add(i);
                    c.add(j);
                }
            }
        }
        for(int i=0; i<r.size(); i++){
            int row=r.get(i);
            int column=c.get(i);
            for(int k=0; k<n; k++){
                matrix[row][k]=0;
            }
            for(int l=0; l<m; l++){
                matrix[l][column]=0;
            }
        }
    }
}