文章目录 思路如下 Manachar代码注释 题解如下 Problem Description One day, sailormoon girls are so delighted that they intend to research about palindromic strings. Operation contains two steps: First step: girls will write a long string (only contains lower case) on…

题目链接:https://vjudge.net/problem/HDU-3294 Girls' research Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3209    Accepted Submission(s): 1228 Problem Description One day, sailormoon girls are so…

题目链接: Hdu 3294  Girls' research 题目描述: 给出一串字符串代表暗码,暗码字符是通过明码循环移位得到的,比如给定b,就有b == a,c == b,d == c,.......,a == z. 问最长回文串所在区间,以及最长回文串所表示的明码. 解题思路: 字符串长度[1,200000],用manacher算法很轻松就搞定了. get√新技能请点击me #include <cstdio> #include <string> #include <c…

http://acm.hdu.edu.cn/showproblem.php?pid=3294 Girls' research Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 3294 Description One day, sailormoon girls are so delighted that they intend to res…

Girls' researchTime Limit: 3000/1000 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 4401 Accepted Submission(s): 1642 Problem Description One day, sailormoon girls are so delighted that they intend to research about pa…

今天打算补前晚 BC 的第二题,发现要用到能在 O(n) 时间求最大回文子串长度的 Manacher 算法,第一次听,于是便去百度了下,看了大半天,总算能看懂了其思想,至于他给出的代码模板我没能完全看懂,只好自己试着实现,发现理解了思想后还是能实现出来的,用自己的风格去写更好理解,先附上讲解 Manacher 算法的几个链接: Manacher算法--O(n)回文子串算法 (我就是看这个理解的~) Manacher算法处理字符串回文 hdu3068之manacher算法+详解 浅谈manache…

# a # b # b # a # 当我们遇到回判断最长回文字符串问题的时候,若果用暴力的方法来做,就是在字符串中间添加 #,然后遍历每一个字符,找到最长的回文字符串.那么马拉车算法就是在这个基础上进行了改进,我觉得和KMP有点像. 当我们遍历第一个字符串的时候,肯定有一个回文串半径. 设一变量mx为半径达到最右边的下标,id为mx的中心,len为最长半径的长度. 如图所示,i关于id存在对称点2id - i,由于左右关于id对称,所以我们要求i的当前最长回文半径,如果i<mx时候, 以2 *…

HDU   3294 Problem Description One day, sailormoon girls are so delighted that they intend to research about palindromic strings. Operation contains two steps:First step: girls will write a long string (only contains lower case) on the paper. For exa…

After an uphill battle, General Li won a great victory. Now the head of state decide to reward him with honor and treasures for his great exploit. One of these treasures is a necklace made up of 26 different kinds of gemstones, and the length of the…

Girls' research Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 537    Accepted Submission(s): 199 Problem Description One day, sailormoon girls are so delighted that they intend to research abo…