摘要：
链接： https://codeforces.com/contest/1180/problem/C 题意： Recently, on the course of algorithms and data structures, Valeriy learned how to use a deque. H 阅读全文
摘要：
链接： https://codeforces.com/contest/1180/problem/B 题意： Nick had received an awesome array of integers a=[a1,a2,…,an] as a gift for his 5 birthday from 阅读全文
摘要：
链接： https://codeforces.com/contest/1180/problem/A 题意： While playing with geometric figures Alex has accidentally invented a concept of a n th order rh 阅读全文
摘要：
链接： https://codeforces.com/contest/1185/problem/D 题意： A sequence a1,a2,…,ak is called an arithmetic progression if for each i from 1 to k elements sat 阅读全文
摘要：
链接： https://codeforces.com/contest/1185/problem/C2 题意： The only difference between easy and hard versions is constraints. If you write a solution in P 阅读全文
摘要：
链接： https://codeforces.com/contest/1185/problem/B 题意： Methodius received an email from his friend Polycarp. However, Polycarp's keyboard is broken, so 阅读全文
摘要：
链接： https://codeforces.com/contest/1185/problem/A 题意： Polycarp decided to relax on his weekend and visited to the performance of famous ropewalkers: A 阅读全文