MS-3

Given a M*N matrix, if matrix[i][j] == 0, set all the elements in row i and column j to '0'.
When you could not use other buffer.
When this is a 3D matrix or nD matrix.

MS-3-1.java

public static void setZeros(int[][] matrix){
    int[] row = new int[matrix.length];
    int[] column = new int[matirx[0].length];
    for(int i = 0; i < matrix.length; i++){
        for(int j = 0; j < matirx[0].length; j++){
            if(matrix[i][j] == 0){
                row[i] = 0;
                colum[j] = 0;
            }
        }
    }
    for(int i = 0; i < matrix.length; i++){
        for(int j = 0; j < matirx[0].length; j++){
            if(row[i] == 0 || column[j] == 0) row[i][j] = 0;
        }
    }
}