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Alice and Bob's game never ends. Today, they introduce a new game. In this game, both of them have N different rectangular cards respectively. Alice w 阅读全文
posted @ 2019-07-24 23:27
GRedComeT
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You can perfectly predict the price of a certain stock for the next N days. You would like to profit on this knowledge, but only want to transact one 阅读全文
posted @ 2019-07-24 20:56
GRedComeT
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As meticulous Gerald sets the table and caring Alexander sends the postcards, Sergey makes snowmen. Each showman should consist of three snowballs: a 阅读全文
posted @ 2019-07-24 17:54
GRedComeT
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Farmer John went to cut some wood and left N (2 ≤ N ≤ 100,000) cows eating the grass, as usual. When he returned, he found to his horror that the clus 阅读全文
posted @ 2019-07-24 16:53
GRedComeT
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Assume the coasting is an infinite straight line. Land is in one side of coasting, sea in the other. Each small island is a point locating in the sea 阅读全文
posted @ 2019-07-24 16:24
GRedComeT
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You are given a rooted tree with n vertices. The vertices are numbered from 1 to n, the root is the vertex number 1. Each vertex has a color, let's de 阅读全文
posted @ 2019-07-24 15:16
GRedComeT
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