Codeforces 1826B Lunatic Never Content题目大意：给出一堆数，各自取同一个mod，让你判断当mod取多少时，这堆数可构成回文串。 解题思路：考察gcd，连续gcd 代码：12345678910111213141516171819202122#include<bits/stdc++.h>using namespace std;typedef long

Codeforces 1826A Trust Nobody题目大意：一群人中有人说谎，每人报出他所知道的说谎人数，让你根据信息判断说谎人数是否能确定。 解题思路：这题可以假设一个i作为假想说谎人数，再通过模拟即可解题 代码：12345678910111213141516171819202122232425262728293031#include<bits/stdc++.h>using

​ 最近将博客从github-page静态托管搬到了服务器，不能豪横使用流量，于是萌生了建立图床的想法，对比了很多方案，还是直接使用github托管最为合适。 ​ 但这又产生一个问题，如果只是单纯使用git推送图片会很麻烦，写作体验感不好，又不想使用PicGo等软件，于是有此文。 进入typora -> 偏好设置 -> 图像 到upgit-releases拉取最新程序 下载好

A. Indirect Sort You are given a permutation a1,a2,…,an of size n, where each integer from 1 to n appears exactly once. You can do the following operation any number of times (possibly, zero): Choose

D. Divisibility by 2^ntime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given an array of positive integers a1,a2,…,an. Make the product of

time limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given n of integers a1,a2,…,an. Process q queries of two types: query of the form “0 xj”:

C. Traffic Lighttime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou find yourself on an unusual crossroad with a weird traffic light. That traffic

Ashish has a string ss of length nn containing only characters ‘a‘, ‘b‘ and ‘c‘. He wants to find the length of the smallest substring, which satisfies the following conditions: Length of the substri

Hanh lives in a shared apartment. There are nn people (including Hanh) living there, each has a private fridge. nn fridges are secured by several steel chains. Each steel chain connects two different

Hanh lives in a shared apartment. There are nn people (including Hanh) living there, each has a private fridge. nn fridges are secured by several steel chains. Each steel chain connects two different