Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: Did you use extra space? A straight forward solution using O(mn) space is probably a bad idea. A simple improvement uses O(m + n) space, but stil…

Set Matrix Zeroes Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. click to show follow up. Follow up: Did you use extra space?A straight forward solution using O(mn) space is probably a bad idea.A simple…

题目: Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: Did you use extra space? A straight forward solution using O(mn) space is probably a bad idea. A simple improvement uses O(m + n) space, but…

原题地址 用矩形的第一行和第一列充当mask 代码: void setZeroes(vector<vector<int> > &matrix) { ].empty()) return; bool firstRow = false; bool firstCol = false; int m = matrix.size(); ].size(); ; i < m; i++) ] == ) { firstCol = true; break; } ; j < n; j++…

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: Did you use extra space?A straight forward solution using O(mn) space is probably a bad idea.A simple improvement uses O(m + n) space, but still…

给定一个矩阵,把零值所在的行和列都置为零.例如: 1 2 3 1 3 1 1 1 操作之后变为 1 3 0 0 0 1 1 方法1: 赋值另存一个m*n的矩阵,在原矩阵为零的值相应置新的矩阵行和列为零.额外空间为O(m*n). 方法2: 两个数组,bool[m] 和 bool[n] 分别存某行有零,后者某列有零.之后根据数组值将原矩阵相应位置置零.额外空间O(m + n). class Solution { public: void setZeroes(vector<vector<int>…

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. click to show follow up. Follow up: Did you use extra space?A straight forward solution using O(mn) space is probably a bad idea.A simple improvement uses O…

题目: Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. Follow up: Did you use extra space? A straight forward solution using O(mn) space is probably a bad idea. A simple improvement uses O(m + n) space, but…

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. 重点是空间复杂度限制为常数． 人家想法: 用 matrix 的第0行和第0列的元素分别记录所对应的行和列是否有0． A[0][0]比较特殊,我们只让它记录第0行的情况,声明另一变量col0记录第0列的情况． 我的实现代码较长,但思路表达的相当清楚．人家也有贼短的代码,人家很牛逼． 算法分两大阶段(细分为 8 s…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in place. (二)解题 题目大意:给定一个M*N的数组,如果(i,j)为0,则将第i行第j列全部元素置为0. 这道题目意思很简单,如果考虑…