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Aragorn's Story Description Our protagonist is the handsome human prince Aragorn comes from The Lord of the Rings. One day Aragorn finds a lot of enem 阅读全文
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1036: [ZJOI2008]树的统计Count Description 一棵树上有n个节点，编号分别为1到n，每个节点都有一个权值w。我们将以下面的形式来要求你对这棵树完成一些操作： I. CHANGE u t : 把结点u的权值改为t II. QMAX u v: 询问从点u到点v的路径上的节点 阅读全文
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E. XOR and Favorite Number Bob has a favorite number k and ai of length n. Now he asks you to answer m queries. Each query is given by a pair li and r 阅读全文
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375. Query on a tree Problem code: QTREE You are given a tree (an acyclic undirected connected graph) with N nodes, and edges numbered 1, 2, 3...N-1. 阅读全文
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Remember the Word Since Jiejie can’t remember numbers clearly, he just uses sticks to help himself. Allowing for Jiejie’sonly 20071027 sticks, he can 阅读全文
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Jam's balance Problem Description Jim has a balance and N weights. (1≤N≤20)The balance can only tell whether things on different side are the same wei 阅读全文
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Draw a Mess It’s graduated season, every students should leave something on the wall, so....they draw a lot ofgeometry shape with different color.When 阅读全文
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Frequent values You are given a sequence of n integers a1, a2, . . . , an in non-decreasing order. In addition to that, youare given several queries c 阅读全文
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等了好久终于等到今天 马上能和群巨们一起学习了 希望不要暴露我太弱的本质............ 北京不冷，就是风大~~~ 1.24 8点准时起床了，准备下楼吃早饭 （这个宾馆好多美美的空姐对面就是东航~） = = 找到今天我们的座位，座位后面是电子科大卿俊。。。。。。 一个半小时热身我们爆零惹，， 阅读全文
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Error CurvesJosephina is a clever girl and addicted to Machine Learning recently. She pays much attention to amethod called Linear ... 阅读全文