http://codeforces.com/gym/100952/problem/C C. Palindrome Again !! time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output Given string with N characters, your task is to transform it to a palindrome…

http://codeforces.com/gym/100952/problem/H H. Special Palindrome time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output A sequence of positive and non-zero integers called palindromic if it can be…

D - Time to go back Gym - 100952D http://codeforces.com/gym/100952/problem/D D. Time to go back time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You have been out of Syria for a long time, a…

gym 100952 A #include <iostream> #include<cstdio> #include<cmath> #include<cstring> #include<algorithm> #include<map> #include<queue> #include<stack> #include<vector> #include<set> using namespac…

http://codeforces.com/gym/100952/problem/G G. The jar of divisors time limit per test 2 seconds memory limit per test 64 megabytes input standard input output standard output Alice and Bob play the following game. They choose a number N to play with.…

http://codeforces.com/gym/100952/problem/F F. Contestants Ranking time limit per test 1 second memory limit per test 24 megabytes input standard input output standard output Ahmad is one of the best students in HIAST, and also a very good problems So…

http://codeforces.com/gym/100952/problem/D D. Time to go back time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You have been out of Syria for a long time, and you recently decided to come ba…

E. Palindrome QueryTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/gym/100570/problem/E Description De Prezer loves palindrome strings. A string s1s2...sn is palindrome if and only if it is equal to its reverse. De Prezer also love…

题意:给定字符串char[],以及Q个操作,操作有三种: 1:pos,chr:把pos位置的字符改为chr 2:pos:问以pos为中心的回文串长度为多长. 3:pos:问以pos,pos+1为中心的回文串长度为多长. 思路:用hash表示一段字符串或者连续子串.我们用BIT记录hash前缀和,那么也可以用BIT修改前缀和.然后blabla,乱搞就行了. 当然为了保险,最好用双hash. (此题暴力也可以过! 暴力代码:3962ms #include<bits/stdc++.h> #defin…

A. Who is the winner? time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output A big marathon is held on Al-Maza Road, Damascus. Runners came from all over the world to run all the way along the road…