2017年7月11日
[USACO09FEB]改造路Revamping Trails
摘要： 题目描述 Farmer John dutifully checks on the cows every day. He traverses some of the M (1 <= M <= 50,000) trails conveniently numbered 1..M from pasture 阅读全文
posted @ 2017-07-11 20:40 kakakakakaka 阅读(552) 评论(0) 推荐(0) 编辑

Never forget why you start

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