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 partitioning ["aa"…
给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串.返回 s 符合要求的的最少分割次数.例如,给出 s = "aab",返回 1 因为进行一次分割可以将字符串 s 分割成 ["aa","b"] 这样两个回文子串.详见:https://leetcode.com/problems/palindrome-partitioning-ii/description/ 首先设置dp变量 cuts[len+1].cuts[i]表示从第i位置到第le…
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&q…
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 partitioning ["aa",…
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","a","…
Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: Input: "aba" Output: True Example 2: Input: "abca" Output: True Explanation: You could delete the character 'c'. N…
Given an integer n, find the closest integer (not including itself), which is a palindrome. The 'closest' is defined as absolute difference minimized between two integers. Example 1: Input: "123" Output: "121" Note: The input n is a po…
参考:http://www.cppblog.com/wicbnu/archive/2013/03/18/198565.html 我太喜欢用dfs和回溯法了,但是这些暴力的方法加上剪枝之后复杂度依然是很高,显然不能达到题目的要求. 这个时候应该考虑动态规划,并且要复杂度尽量接近O(n^2)的算法. 下面这个方法更加简洁:自长到短找到回文串后,往后dfs,并记录递归深度表示并更新最小划分数.http://fisherlei.blogspot.com/2013/03/leetcode-palindro…
131. 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"], ["…
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 pa…
题目描述 给定一个字符串 s,找到 s中最长的回文子串.你可以假设 s 的最大长度为1000. 示例1 输入: "babad" 输出: "bab" 注意: "aba"也是一个有效答案. 示例2 输入: "cbbd" 输出: "bb" 解题 对于这道题,最简单的方法就是暴力求解了.对于很多算法题,我想会暴力求解是最基本的能力,但也绝不能满足于暴力,而且很多题的暴力解法都是很类似的. 这道题与其他的暴力解法一样…
package y2019.Algorithm.dynamicprogramming.hard; /** * @Auther: xiaof * @Date: 2019/12/11 08:59 * @Description: 1278. 分割回文串 III * * 给你一个由小写字母组成的字符串 s,和一个整数 k. * 请你按下面的要求分割字符串: * 首先,你可以将 s 中的部分字符修改为其他的小写英文字母. * 接着,你需要把 s 分割成 k 个非空且不相交的子串,并且每个子串都是回文串.…
大意: 给定字符串, 求多少个区间重排后能使原串为回文串. 先特判掉特殊情况, 对于两侧已经相等的位置之间可以任意组合, 并且区间两端点至少有一个在两侧相等的位置处, 对左右两种情况分别求出即可. #include <iostream> #include <algorithm> #include <cstdio> #include <math.h> #include <set> #include <map> #include <…
1. 具体题目 给定一个包含大写字母和小写字母的字符串,找到通过这些字母构造成的最长的回文串.在构造过程中,请注意区分大小写.比如 "Aa" 不能当做一个回文字符串. 注意: 假设字符串的长度不会超过 1010. 示例 1: 输入: "abccccdd" 输出: 7 解释:我们可以构造的最长的回文串是"dccaccd", 它的长度是 7. 2. 思路分析 回文串是以中间为轴左右对称的,所以希望有一个中心元素,其余元素个数都为偶数. 首先想到统计字…
原题地址:https://oj.leetcode.com/problems/palindrome-partitioning-ii/ 题意: 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 = …
 Palindrome Time Limit:15000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Description Andy the smart computer science student was attending an algorithms class when the professor asked the students a simple question, &quo…
题目描述 给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串. 返回符合要求的最少分割次数. 示例: 输入: "aab" 输出: 1 解释: 进行一次分割就可将 s 分割成 ["aa","b"] 这样两个回文子串. 解题思路 动态规划思想.从最后一个字符开始向前遍历,每次判断以当前字符为首字母依次到最后字符的子字符串是否为回文串,若是则更新包含当前回文串的最小回文串数.具体想法可参考leetcode之 Palindrome Part…
131. 分割回文串 131. Palindrome Partitioning 题目描述 给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串. 返回 s 所有可能的分割方案. LeetCode131. Palindrome Partitioning中等 示例: 输入: "aab" 输出: [   ["aa","b"],   ["a","a","b"]] Java 实现 略…
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. Example: Input: "aab" Output: 1 Explanation: The palindrome partitioning ["aa"…
Leetcode之回溯法专题-131. 分割回文串(Palindrome Partitioning) 给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串. 返回 s 所有可能的分割方案. 示例: 输入: "aab" 输出: [ ["aa","b"], ["a","a","b"] ] 分析:给定一个字符串,要求分割,并且要求分割出来的所有的串是回文串.利用回溯,每次dfs分两…
[抄题]: 给定一个字符串s,将s分割成一些子串,使每个子串都是回文. 返回s符合要求的的最少分割次数. [思维问题]: 不知道要用预处理字符串降低复杂度 [一句话思路]: 先把预处理获得s中回文串的结果放在数组中,之后直接调用 [输入量]:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不合理的输入): [画图]: [一刷]: 长区间依赖于短区间:先循环长度,再循环起点.递推关系:当前回文分割=下一字回文分割&当前字母.要有返回函数. 需要计算s.charAt(i 字符串取…
题目描述 给定一个字符串 s,将 s 分割成一些子串,使每个子串都是回文串. 返回 s 所有可能的分割方案. 示例: 输入: "aab" 输出: [ ["aa","b"], ["a","a","b"] ] 解题思路 回溯思想.首先遍历字符串的各个子字符串,记录它们是否为回文串,然后对字符串各个索引递归判断回文串并加入到结果集合中. 代码 class Solution { public:…
Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This is case sensitive, for example "Aa" is not considered a palindrome here. Note: Assume the leng…
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…
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. Example 1: Input: "aacecaaa" Output: "aaacecaaa&quo…
Given a string s, return all the palindromic permutations (without duplicates) of it. Return an empty list if no palindromic permutation could be form. For example: Given s = "aabb", return ["abba", "baab"]. Given s = "a…
Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. Example: Input: "aab" Output: [ ["aa","b"], ["a","a","b"…
[抄题]: 给定一个字符串s,将s分割成一些子串,使每个子串都是回文串. 返回s所有可能的回文串分割方案. 给出 s = "aab",返回 [ ["aa", "b"], ["a", "a", "b"] ] [思维问题]: [一句话思路]: [输入量]:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不合理的输入): [画图]: [一刷]: 主函数中要记得新建parti…
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",Return1since the palindrome partitioning["aa",&quo…
问题 该文章的最新版本已迁移至个人博客[比特飞],单击链接 https://www.byteflying.com/archives/3899 访问. 给定一个字符串,验证它是否是回文串,只考虑字母和数字字符,可以忽略字母的大小写. 说明:本题中,我们将空字符串定义为有效的回文串. 输入: "A man, a plan, a canal: Panama" 输出: true 输入: "race a car" 输出: false Given a string, deter…