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思路 考虑 Bob 的策略: 如果 Alice 选了物品 iii,那么 Bob 如果选了物品 iii 会使得 Alice 对于这个物品亏多少钱。 原来赚的钱:bi−aib_{i}-a_{i}bi−ai。 Bob 选后本金的亏损:−ai-a_{i}−ai。 那么 Bob 如果选了物品 iii 会 阅读全文
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P2953 [USACO09OPEN] Cow Digit Game S 题目描述 Bessie is playing a number game against Farmer John, and she wants you to help her achieve victory. Game i s 阅读全文
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P3044 [USACO12FEB] Relocation S 题目描述 Farmer John is moving! He is trying to find the best place to build a new farm so as to minimize the amount of tr 阅读全文