题意:给定两个长度相等的仅由小写字母组成的串A和B,问在A中最少选择多少段互不相交的子串进行翻转能使A和B相同 len<=5e5 思路:构造新串S=a[1]b[1]a[2]b[2]...a[n]b[n] 问题等价于求S的最小回文分割,其中需要每一段的长度都为偶数,注意长度为2的相当于没有翻转 把板子稍加修改即可 #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned int u…
E. Palisection time limit per test 2 seconds memory limit per test 128 megabytes input standard input output standard output In an English class Nick had nothing to do at all, and remembered about wonderful strings called palindromes. We should remin…
Find the smallest prime palindrome greater than or equal to N. Recall that a number is prime if it's only divisors are 1 and itself, and it is greater than 1. For example, 2,3,5,7,11 and 13 are primes. Recall that a number is a palindrome if it reads…