摘要：
链接： https://codeforces.com/contest/1265/problem/E 题意： Creatnx has n mirrors, numbered from 1 to n. Every day, Creatnx asks exactly one mirror "Am I be 阅读全文
摘要：
链接： https://codeforces.com/contest/1265/problem/D 题意： An integer sequence is called beautiful if the difference between any two consecutive numbers is 阅读全文
摘要：
链接： https://codeforces.com/contest/1265/problem/C 题意： So the Beautiful Regional Contest (BeRC) has come to an end! n students took part in the contest 阅读全文
摘要：
链接： https://codeforces.com/contest/1265/problem/B 题意： You are given a permutation p=[p1,p2,…,pn] of integers from 1 to n. Let's call the number m (1≤m 阅读全文
摘要：
链接： https://codeforces.com/contest/1265/problem/A 题意： A string is called beautiful if no two consecutive characters are equal. For example, "ababcb", 阅读全文