Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or down. You may NOT move diagonally or move outside of the boundary (i.e. wrap-around is not allowed). E…
突然很想刷刷题,LeetCode是一个不错的选择,忽略了输入输出,更好的突出了算法,省去了不少时间. dalao们发现了任何错误,或是代码无法通过,或是有更好的解法,或是有任何疑问和建议的话,可以在对应的随笔下面评论区留言,我会及时处理,在此谢过了. 过程或许会很漫长,也很痛苦,慢慢来吧. 编号 题名 过题率 难度 1 Two Sum 0.376 Easy 2 Add Two Numbers 0.285 Medium 3 Longest Substring Without Repeating C…
1. Array 基础 27 Remove Element 26 Remove Duplicates from Sorted Array 80 Remove Duplicates from Sorted Array II 277 Find the Celebrity 189 Rotate Array 41 First Missing Positive 299 Bulls and Cows 134 Gas Station 118 Pascal's Triangle 很少考 119 Pascal's…
[11] Container With Most Water [Medium] O(n^2)的暴力解法直接TLE. 正确的解法是Two Pointers. O(n)的复杂度.保持两个指针i,j:分别指向长度数组的首尾.如果ai 小于aj,则移动i向后(i++).反之,移动j向前(j--).如果当前的area大于了所记录的area,替换之.这个想法的基础是,如果i的长度小于j,无论如何移动j,短板在i,不可能找到比当前记录的area更大的值了,只能通过移动i来找到新的可能的更大面积. class…
题目 Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or down. You may NOT move diagonally or move outside of the boundary (i.e. wrap-around is not allowed)…
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…
https://leetcode.com/problems/longest-increasing-path-in-a-matrix/ Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or down. You may NOT move diagonally o…
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…
最后更新 三刷? 找矩阵里的最长路径. 看起来是DFS,实际上也就是.但是如果从每个点都进行一次DFS然后保留最大的话,会超时. 这里需要结合DP,dp[i][j]表示以此点开始的最长路径,这样每次碰到的时候,如果已经算过,可以直接调取这个值. 用空间交换了部分时间. 写的时候我吸取教训,把边界判断放在DFS的开始.. Time Complexity: 不会算.. O(4mn)?因为只能单方向= =,每个点往一个方向延伸,就不可能回来. Space : O(m*n) public class S…
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. 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…
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…
［抄题］: Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in-place. Example 1: Input: [ [1,1,1], [1,0,1], [1,1,1] ] Output: [ [1,0,1], [0,0,0], [1,0,1] ] [暴力解法]: 时间分析: 空间分析: [优化后]: 时间分析: 空间分析: ［奇葩输出条件］: ［奇葩…
Matrix Time Limit: 2 Seconds Memory Limit: 65536 KB Given an n*n matrix A, whose entries Ai,j are integer numbers ( 0 <= i < n, 0 <= j < n ). An operation SHIFT at row i ( 0 <= i < n ) will move the integers in the row one position…
Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or down. You may NOT move diagonally or move outside of the boundary (i.e. wrap-around is not allowed). E…
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:矩阵置0 难度:Easy 题目内容: Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in-place. 翻译: 给定一个m x n矩阵,如果一个元素是0,就把它的整行和列设为0. 要求:就地置0. Example 1: Input: [ [1,1,1], [1,0,1], [1,1,1] ] Output: [ [1,0,1], [0,0,0], …
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. 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 u…
Given an integer matrix, find the length of the longest increasing path.From each cell, you can either move to four directions: left, right, up or down. You may NOT move diagonally or move outside of the boundary (i.e. wrap-around is not allowed).Exa…
