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ACM

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Traffic Network in Numazu

Traffic Network in Numazu 题目描述 Chika is elected mayor of Numazu. She needs to manage the traffic in this city. To manage the traffic is too hard for...

图论 LCA 树状数组

2018-08-18

0 357

【lca+输入】Attack on Alpha-Zet

Attack on Alpha-Zet 题目描述 Space pirate Captain Krys has recently acquired a map of the artificial and highly secure planet Alpha-Zet which he has bee...

树 LCA

2018-09-12

0 458