摘要：
链接： https://codeforces.com/contest/1270/problem/D 题意： This problem is interactive. We have hidden an array a of n pairwise different numbers (this mea 阅读全文
摘要：
链接： https://codeforces.com/contest/1270/problem/C 题意： Let's call an array a1,a2,…,am of nonnegative integer numbers good if a1+a2+⋯+am=2⋅(a1⊕a2⊕⋯⊕am), 阅读全文
摘要：
链接： https://codeforces.com/contest/1270/problem/B 题意： For an array a of integers let's denote its maximal element as max(a), and minimal as min(a). We 阅读全文
摘要：
链接： https://codeforces.com/contest/1270/problem/A 题意： Two players decided to play one interesting card game. There is a deck of n cards, with values f 阅读全文