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In order to get from one of the F (1 <= F <= 5,000) grazing fields (which are numbered 1..F) to another field, Bessie and the rest of the herd are for 阅读全文
posted @ 2020-05-05 23:33
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题目描述 There are exactly nnn towns in Byteotia. Some towns are connected by bidirectional roads. There are no crossroads outside towns, though there may 阅读全文
posted @ 2020-05-05 15:39
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