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Alice's present Description As a doll master, Alice owns a wide range of dolls, and each of them has a number tip on it's back, the tip can be treated 阅读全文
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2588: Spoj 10628. Count on a tree Description 给定一棵N个节点的树，每个点有一个权值，对于M个询问(u,v,k)，你需要回答u xor lastans和v这两个节点间第K小的点权。其中lastans是上一个询问的答案，初始为0，即第一个询问的u是明文。 阅读全文
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K-th Number Description You are working for Macrohard company in data structures department. After failing your previous task about key insertion you 阅读全文
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Caocao's Bridges Problem Description Caocao was defeated by Zhuge Liang and Zhou Yu in the battle of Chibi. But he wouldn't give up. Caocao's army sti 阅读全文
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Problem A: Krito的讨伐 Description Krito终于干掉了99层的boss，来到了第100层。第100层可以表示成一颗树，这棵树有n个节点（编号从0到n-1），树上每一个节点可能有很多只怪物。 Krito现在在0号节点，现在它想要区清除这一层所有的怪物。他现在有atk大小的 阅读全文
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Problem F: 我是好人4 Description 众所周知，我是好人！所以不会出太难的题，题意很简单 给你n个数，问你1000000000（含1e9）以内有多少个正整数不是这n个数任意一个的倍数 最后友情提供解题代码（我真是太好人了） void solve(int p[], int n) { 阅读全文
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Problem 1608 - Calculation Description Today, Alice got her math homework again! She had n integers, and she needed to divide them into several piles 阅读全文
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Problem 1603 - Minimum Sum Description There are n numbers A[1] , A[2] .... A[n], you can select m numbers of it A[B[1]] , A[B[2]] ... A[B[m]] ( 1 <= 阅读全文
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1013: [JSOI2008]球形空间产生器sphere Description 有一个球形空间产生器能够在n维空间中产生一个坚硬的球体。现在，你被困在了这个n维球体中，你只知道球面上n+1个点的坐标，你需要以最快的速度确定这个n维球体的球心坐标，以便于摧毁这个球形空间产生器。 有一个球形空间产生 阅读全文
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Placing Lampposts As a part of the mission ‘Beautification of Dhaka City’, the government has decided to replace all theold lampposts with new expensiv 阅读全文