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CSU "2034" Column Addition Description A multi digit column addition is a formula on adding two integers written like this: A multi digit column addit 阅读全文
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CSU "2031" Barareh on Fire Description The Barareh village is on fire due to the attack of the virtual enemy. Several places are already on fire and t 阅读全文
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CSU "2019" Fleecing the Raffle Description A tremendously exciting raffle is being held, with some tremendously exciting prizes being given out. All y 阅读全文
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CSU "1908" The Big Escape Description There is a tree like prison. Expect the root node, each node has a prisoner, and the root node is the only exit. 阅读全文
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CSU "2172" 买一送一 Description ICPCCamp 有 n 个商店，用 1, 2, …, n 编号。对于任意 i 1，有从商店 $p_i$ 到 i 的单向道路。 同时，商店 i 出售类型为 $a_i$ 的商品。 Bobo 从商店 1 出发前往商店 i 。他要在两个不同的商店购买 阅读全文