'''
Description: 
Autor: Au3C2
Date: 2021-03-21 10:14:49
LastEditors: Au3C2
LastEditTime: 2021-03-21 10:15:20
'''
class Solution:
    def setZeroes(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        
        m, n = len(matrix), len(matrix[0])
        row = set()
        column = set()
        for i in range(m):
            for j in range(n):
                if matrix[i][j] == 0:
                    row.add(i)
                    column.add(j)
        
        for i in row:
            for j in range(n):
                matrix[i][j] = 0
        for j in column:
            for i in range(m):
                matrix[i][j] = 0

# 数组，中等。这算法也能99%？
# https://leetcode-cn.com/problems/set-matrix-zeroes/