class Solution:
    def setZeroes(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        hash_column = set()
        hash_row = set()

        for i in range(len(matrix)):
            for j in range(len(matrix[0])):
                if matrix[i][j] == 0:
                    hash_column.add(i)
                    hash_row.add(j)

        for i in list(hash_column):
            for j in range(len(matrix[0])):
                 matrix[i][j] = 0

        for i in range(len(matrix)):
            for j in list(hash_row):
                 matrix[i][j] = 0