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2019年3月29日
P3084 [USACO13OPEN]照片Photo（差分约束）
摘要： 题目描述 Farmer John has decided to assemble a panoramic photo of a lineup of his N cows (1 <= N <= 200,000), which, as always, are conveniently numbered 阅读全文
posted @ 2019-03-29 22:03 Through_The_Night 阅读(248) 评论(0) 推荐(0)