97. Interleaving String Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. For example, Given: s1 = "aabcc", s2 = "dbbca", When s3 = "aadbbcbcac", return true. When s3 = "aadbbbaccc", retu…
引言 二维动态规划中最常见的是棋盘型二维动态规划. 即 func(i, j) 往往只和 func(i-1, j-1), func(i-1, j) 以及 func(i, j-1) 有关 这种情况下,时间复杂度 O(n*n),空间复杂度往往可以优化为O(n) 例题 1 Minimum Path Sum Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right whi…
php类库PHP QR Code 二维码 php类库PHP QR Code 二维码 php类库PHP QR CodePHP QR Code is open source (LGPL) library for generating QR Code, 2-dimensional barcode. Based on libqrencode C library, provides API for creating QR Code barcode images (PNG, JPEG thanks to G…
题目描述与背景介绍 背景题目: [674. 最长连续递增序列]https://leetcode-cn.com/problems/longest-continuous-increasing-subsequence/ [300. 最长递增子序列]https://leetcode-cn.com/problems/longest-increasing-subsequence/ 这两个都是DP的经典题目,674比较简单. 代码: class Solution { public int findLength…
有n个程序,这n个程序运作产生m行代码,但是每个程序产生的BUG总和不能超过b, 给出每个程序产生的代码,每行会产生ai个BUG,问在总BUG不超过b的情况下, 我们有几种选择方法思路:看懂了题意之后就是一个完全背包题了 定义dp[ i ][ j ][ k ] 表示前 i 个程序员,已经写了 j 行代码, 已经产生了 k 个 bugs . 根据题意,得知第 i 个程序员会写 r 行代码,那么相当于 dp[ i ][ j ][ k ] += dp[i - 1][j - r][k - ra[ i ]…
题目描述 Programmers working on a large project have just received a task to write exactly mm lines of code. There are nn programmers working on a project, the ii -th of them makes exactly a_{i}ai bugs in every line of code that he writes. Let's call a…
