[leetcode]Set Matrix Zeroes @ Python

原题地址:https://oj.leetcode.com/problems/set-matrix-zeroes/

题意:Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place.

解题思路:分别记录两个向量x, y,保存行和列是否有0,再次遍历数组时查询对应的行和列然后修改值。

代码:

class Solution:
    # @param matrix, a list of lists of integers
    # RETURN NOTHING, MODIFY matrix IN PLACE.
    def setZeroes(self, matrix):
        rownum = len(matrix)
        colnum = len(matrix[0])
        row = [False for i in range(rownum)]
        col = [False for i in range(colnum)]
        for i in range(rownum):
            for j in range(colnum):
                if matrix[i][j] == 0:
                    row[i] = True
                    col[j] = True
        for i in range(rownum):
            for j in range(colnum):
                if row[i] or col[j]:
                    matrix[i][j] = 0
                    

 

    原文作者:南郭子綦
    原文地址: https://www.cnblogs.com/zuoyuan/p/3769698.html
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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