class Solution:
    def setZeroes(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        row = []
        col = []
        m = len(matrix)
        n = len(matrix[0])
        for i in range(m):
            for j in range(n):
                if matrix[i][j] == 0:
                    if i not in row:
                        row.append(i)
                    if j not in col:
                        col.append(j)
        
        for i in range(m):
            if i in row:
                for j in range(n):
                    matrix[i][j] = 0
            else:
                for j in range(n):
                    if j in col:
                        matrix[i][j] = 0