ACM-ICPC国际大学生程序设计竞赛北京赛区（2017）网络赛-A-Visiting Peking University

时间限制:1000ms 单点时限:1000ms 内存限制:256MB 描述 Ming is going to travel for n days and the date of these days can be represented by n integers: 0, 1, 2, …, n-1. He plans to spend m consecutive days（2 ≤ m ≤ n）in

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