题目: Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. Example Given s = "aab", return: [ ["aa","b"], ["a","a","…

Palindrome Partitioning II  Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning of s. For example, given s = "aab",Return 1 since the palindrome p…

Palindrome Partitioning Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. For example, given s = "aab",Return [ ["aa","b"], ["a&qu…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/palindrome-partitioning/description/ 题目描述 Given a string s, partition s such that every substring of the partition is a palindrome. Re…

题目如下: You are given a string s containing lowercase letters and an integer k. You need to : First, change some characters of s to other lowercase English letters. Then divide s into k non-empty disjoint substrings such that each substring is palindro…

https://leetcode.com/problems/palindrome-partitioning-ii/description/ [题意] 给定一个字符串,求最少切割多少下,使得切割后的每个子串都是回文串 [思路] 求一个字符串的所有子串是否是回文串,O(n^2) dp从后往前推 vector<vector<bool> > p(len,vector<bool>(len)); ;i<len-;i++){ ;j<len-;j++){ if(j!=i)…

 二分法:通过O(1)的时间,把规模为n的问题变为n/2.T(n) = T(n/2) + O(1) = O(logn). 基本操作:把长度为n的数组,分成前区间和后区间.设置start和end下标.int start = 0, end = nums.length - 1.循环结束条件为start + 1 < end ,即相邻时结束循环,所以最后需判断start和end中哪个是目标值.指针变化为start = mid,取后半区间:end = mid,取前半区间. 经典二分搜索:1. First p…

[题目大意] 给出一个字符串,可以删除或添加一些字符,它们各自会消耗价值.问最少消耗多少价值,可以使得字符串变成回文的. [思路] 事实上删除或添加字符的价值只需要保持较小的那一个.假设当前要将(j,i)转换为回文字符,那么它有以下三种情况: (1)在结尾添加或删除一个和开头一样的字符,f[j][i-1]+cost[s[i]-'a']: (2)在开头添加或删除一个和结尾一样的字符,f[j+1][i]+cost[s[j]-'a']: (3)如果开头和结尾的字符本来就是一样的,就有f[j+1][i-…

题目简述: Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan, a canal: Panama" is a palindrome. "race a car" is not a palindrome. Note: Have you conside…

Given a string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation. For example: Given "aacecaaa", return "aaacecaaa&qu…