摘要：
链接：https://codeforces.com/contest/1174/problem/C 题意： You're given an integer nn. For every integer ii from 22 to nn, assign a positive integer aiai su 阅读全文
摘要：
链接：https://codeforces.com/contest/1174/problem/B 题意： You're given an array aa of length nn. You can perform the following operation on it as many time 阅读全文
摘要：
链接：https://codeforces.com/contest/1174/problem/A 题意： You're given an array aa of length 2n2n. Is it possible to reorder it in such way so that the sum 阅读全文
摘要：
链接：https://vjudge.net/problem/HDU-3966 题意： Our protagonist is the handsome human prince Aragorn comes from The Lord of the Rings. One day Aragorn find 阅读全文