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Rinne Loves Edges 题目描述 Rinne 最近了解了如何快速维护可支持插入边删除边的图，并且高效的回答一下奇妙的询问。 她现在拿到了一个 n 个节点 m 条边的无向连通图，每条边有一个边权 wiwi 现在她想玩一个游戏：选取一个 “重要点” S，然后选择性删除一些边，使得原图中所有除 阅读全文
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Bag of mice CodeForces - 148D The dragon and the princess are arguing about what to do on the New Year's Eve. The dragon suggests flying to the mounta 阅读全文
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A Dangerous Maze LightOJ - 1027 You are in a maze; seeing n doors in front of you in beginning. You can choose any door you like. The probability for 阅读全文
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Dice (III) LightOJ - 1248 Given a dice with n sides, you have to find the expected number of times you have to throw that dice to see all its faces at 阅读全文
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Aeroplane chess HDU - 4405 Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each s 阅读全文
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Discovering Gold LightOJ - 1030 You are in a cave, a long cave! The cave can be represented by a 1 x N grid. Each cell of the cave can contain any amo 阅读全文