摘要:
题目描述 Farmer John's N (1 <= N <= 100,000) cows are lined up in a row and numbered 1..N. The cows are conducting another one of their strange protests, 阅读全文
摘要:
http://codeforces.com/problemset/problem/946/D Ivan is a student at Berland State University (BSU). There are n days in Berland week, and each of thes 阅读全文