题目: Given two strings, find the longest common subsequence (LCS). Your code should return the length of LCS. Clarification What's the definition of Longest Common Subsequence? https://en.wikipedia.org/wiki/Longest_common_subsequence_problem http://ba…

题目如下: Given two strings text1 and text2, return the length of their longest common subsequence. A subsequence of a string is a new string generated from the original string with some characters(can be none) deleted without changing the relative order…

题目: Given a sequence of integers, find the longest increasing subsequence (LIS). You code should return the length of the LIS. Clarification What's the definition of longest increasing subsequence? The longest increasing subsequence problem is to fin…

[SP1812]LCS2 - Longest Common Substring II 题面 洛谷 题解 你首先得会做这题. 然后就其实就很简单了, 你在每一个状态\(i\)打一个标记\(f[i]\)表示状态\(i\)能匹配到最长的子串长度, 显然\(f[i]\)可以上传给\(f[i.fa]\). 然后去每个串和第\(1\)个串\(f\)的最小值的最大值即可. 代码 #include <iostream> #include <cstdio> #include <cstdlib&…

[SP1811]LCS - Longest Common Substring 题面 洛谷 题解 建好后缀自动机后从初始状态沿着现在的边匹配, 如果失配则跳它的后缀链接,因为你跳后缀链接到达的\(Endpos\)集合中的串肯定是当前\(Endpos\)中的后缀,所以这么做是对的. 你感性理解一下,这样显然是最大的是吧... 具体实现看代码: 代码 #include <iostream> #include <cstdio> #include <cstdlib> #inclu…

[LeetCode]522. Longest Uncommon Subsequence II 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/longest-uncommon-subsequence-ii/description/ 题目描述: Given a list of strings, you…

Given an unsorted array of integers, find the length of longest increasing subsequence. For example, Given [10, 9, 2, 5, 3, 7, 101, 18], The longest increasing subsequence is [2, 3, 7, 101], therefore the length is 4. Note that there may be more than…

http://www.spoj.com/problems/LCS2/ 发现了我原来对sam的理解的一个坑233 本题容易看出就是将所有匹配长度记录在状态上然后取min后再对所有状态取max. 但是不要忘记了一点:更新parent树的祖先. 为什么呢?首先如果子树被匹配过了,那么长度一定大于任意祖先匹配的长度(甚至有些祖先匹配长度为0!为什么呢,因为我们在匹配的过程中,只是找到一个子串,可能还遗漏了祖先没有匹配到,这样导致了祖先的记录值为0,那么在对对应状态取min的时候会取到0,这样就wa了.而…

题目: Write a function to find the longest common prefix string amongst an array of strings. 思路:求最长前缀子串,假设第一个字符串是最长前缀子串,采用增强for得到数组中每个字符串,分别与第一个字符串的同一位置进行比较,有一个字符串在该位置不一致,就返回. public class Solution { public String longestCommonPrefix(String[] strs) { i…

Write a function to find the longest common prefix string amongst an array of strings. Solution: class Solution { public: string longestCommonPrefix(vector<string>& strs) { //runtime:4ms string str=""; if(strs.empty())return str; ; whi…