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The Fool "题目链接" Problem Description The Fool is numbered 0 – the number of unlimited potential –and therefore does not have a specific place in the se 阅读全文
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Function "题目链接" Problem Description wls 有 n 个二次函数 Fi(x) = aix2 + bix + ci (1 ≤ i ≤ n). 现在他想在∑ni=1xi = m 且 x 为正整数的条件下求∑ni=1Fi(xi)的最小值。 请求出这个最小值。 Input 阅读全文
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Eat the Trees "题目链接" Most of us know that in the game called DotA(Defense of the Ancient), Pudge is a strong hero in the first period of the game. Whe 阅读全文
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Mondriaan's Dream "题目链接" Problem Description Squares and rectangles fascinated the famous Dutch painter Piet Mondriaan. One night, after producing the 阅读全文
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Wall "题目链接" . Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 42823 Accepted: 14602 Description Once upon a time there was a greedy King wh 阅读全文
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传递闭包 在数学中,在集合 X 上的二元关系 R 的传递闭包是包含 R 的 X 上的最小的传递关系。 例如,如果 X 是(生或死)人的集合而 R 是关系“为父子”,则 R 的传递闭包是关系“x 是 y 的祖先”。再比如,如果 X 是空港的集合而关系 xRy 为“从空港 x 到空港 y 有直航”,则 阅读全文