class Solution:
def setZeroes(self, matrix: List[List[int]]) -> None:
"""
Do not return anything, modify matrix in-place instead.
"""
n_row = len(matrix)
n_col = len(matrix[0])
zero_coor = []
for i in range(n_row):
for j in range(n_col):
if matrix[i][j] == 0:
zero_coor.append([i, j])
for (i, j) in zero_coor:
matrix[i] = [0 for _ in range(n_col)]
for x in range(n_row):
matrix[x][j] = 0