Solution.java

package $073;

/**
 * @author Junlan Shuai[shuaijunlan@gmail.com].
 * @date Created on 9:43 AM 2018/07/23.
 */
public class Solution {
    public void setZeroes(int[][] matrix) {
        int col0 = 1;
        int row = matrix.length;
        int col = matrix[0].length;

        for (int i = 0; i < row; i++){
            if (matrix[i][0] == 0){
                col0 = 0;
            }
            for (int j = 1; j < col; j++){
                if (matrix[i][j] == 0){
                    matrix[i][0] = 0;
                    matrix[0][j] = 0;
                }
            }
        }
        for (int i = row - 1; i >= 0; i--){
            for (int j = col - 1; j >= 1; j--){
                if (matrix[i][0] == 0 || matrix[0][j] == 0){
                    matrix[i][j] = 0;
                }
            }
            if (col0 == 0){
                matrix[i][0] = 0;
            }
        }
    }
}