leetcode学习笔记(矩阵置零)

标记数组：

class Solution:
    def setZeroes(self, matrix: List[List[int]]) -> None:
        m = len(matrix)
        n = len(matrix[0])
        row = [1] * m
        col = [1] * n

        for i in range(m):
            for j in range(n):
                if matrix[i][j] == 0:
                    row[i] = col[j] = 0
        
        for i in range(m):
            for j in range(n):
                if row[i] == 0 or col[j] == 0:
                    matrix[i][j] = 0