摘要：
Problem Description John is a Chief Executive Officer at a privately owned medium size company. The owner of the company has de... 阅读全文
摘要：
Problem Description John is a Chief Executive Officer at a privately owned medium size company. The owner of the company has de... 阅读全文
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Problem Description Farmer John has decided to reward his cows for their hard work by taking them on a tour of the big city! Th... 阅读全文
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Problem Description David the Great has just become the king of a desert country. To win the respect of his people, he decided ... 阅读全文
摘要：
Problem Description David the Great has just become the king of a desert country. To win the respect of his people, he decided ... 阅读全文
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Problem Description In a certain course, you take n tests. If you get ai out of bi questions correct on test i, your cumulative... 阅读全文
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Problem Description In this problem, we would like to talk about unreachable sets of a directed acyclic graph G = (V, E). In m... 阅读全文
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【概述】 在 DAG 的覆盖与独立集问题中，常见的问题分为三类： 最小路径点覆盖最小路径可重复点覆盖最大独立集数这三类问题都可以利用二分图的匈牙利算法来解决。 【最小路径覆盖】 最小路径覆盖：给定一张有向无环图，要求用尽量少的不相交的简单路径，覆盖有向无环图的... 阅读全文
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Problem Description Roundgod is a famous milk tea lover at Nanjing University second to none. This year, he plans to conduct a ... 阅读全文
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Problem Description Considering the overall difficulty of other problems, we invite Quailty to propose an easy problem for this... 阅读全文