set_matrix_zeros
set_matrix_zeros.py 源码
# 矩阵置零
from typing import List
class Solution:
# 记录0出现的位置，然后再置为0
def setZeroes_1(self, matrix: List[List[int]]) -> None:
"""
Do not return anything, modify matrix in-place instead.
"""
hor, ver = set(), set()
for i in range(len(matrix)):
for j in range(len(matrix[i])):
if matrix[i][j] == 0:
hor.add(i), ver.add(j)
for i in hor:
matrix[i] = [0] * len(matrix[0])
for i in ver:
for j in range(len(matrix)):
matrix[j][i] = 0
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