摘要：题目：http://codeforces.com/contest/553/problem/A 题意：给你k个颜色的球，下面k行代表每个颜色的球有多少个，规定第i种颜色的球的最后一个在第i-1种颜色的球的最后一个的前面 思路：首先我们想如果是第i种颜色，我们首先必须把这个颜色留下一个，留下的这个球前面 阅读全文

摘要：The cows, as you know, have no fingers or thumbs and thus are unable to play Scissors, Paper, Stone' (also known as 'Rock, Paper, Scissors', 'Ro, Sham 阅读全文