题目描述 Farmer John's N (1 <= N <= 1,000) cows conveniently numbered 1..N are participating in the IOI in Bulgaria. The cows like the Bulgarian sun and are enjoying their holiday. All seems well. This
Dinner 时间限制: 100 ms | 内存限制: 65535 KB 难度: 1 描述 Little A is one member of ACM team. He had just won the gold in World Final. To celebrate, he decided to invite all to have one meal. As bo