力扣每日一题 零矩阵

Day 6

Date: September 30, 2022 9:08 AM
LinkedIn: https://leetcode.cn/problems/zero-matrix-lcci/
Title: 零矩阵

直接标记加暴力了

class Solution:
    def setZeroes(self, matrix: List[List[int]]) -> None:
        """
        Do not return anything, modify matrix in-place instead.
        """
        index_i = [] #标记需要置0的行下标
        index_j = [] #标记需要置0的列下标
        for i in range(0, len(matrix)):
            for j in range(0,len(matrix[0])):
                if(matrix[i][j]==0):
                    index_i.append(i)
                    index_j.append(j)
        index_i = list(set(index_i)) #去重
        index_j = list(set(index_j))
        for index in index_i: #行
            for j in range(0, len(matrix[0])):
                matrix[index][j]=0
        for index in index_j: #列
            for i in range(0, len(matrix)):
                matrix[i][index]=0