摘要： Problem Description There is a youngster known for amateur propositions concerning several mathematical hard problems.Nowadays, he is preparing a thou 阅读全文

摘要： Description The French author Georges Perec (1936–1982) once wrote a book, La disparition, without the letter 'e'. He was a member of the Oulipo group 阅读全文

摘要： Problem Description This is a simple problem. Given two triangles A and B, you should determine they are intersect, contain or disjoint. (Public edge 阅读全文

摘要： Problem Description Therearex frogs and y chicken in a garden. Kim found there are n heads and m legs in the garden. Please tell Kim how many frogs an 阅读全文

摘要： Problem Description C国的死对头A国这段时间正在进行军事演习，所以C国间谍头子Derek和他手下Tidy又开始忙乎了。A国在海岸线沿直线布置了N个工兵营地,Derek和Tidy的任务就是要监视这些工兵营地的活动情况。由于采取了某种先进的监测手段，所以每个工兵营地的人数C国都掌握的 阅读全文

摘要： You are trapped in a 3D dungeon and need to find the quickest way out! The dungeon is composed of unit cubes which may or may not be filled with rock. 阅读全文

摘要： ZZX has a sequence of boxes numbered 1,2,...,n1,2,...,n. Each box can contain at most one ball. You are given the initial configuration of the balls. 阅读全文

摘要： As we know, Rikka is poor at math. Yuta is worrying about this situation, so he gives Rikka some math tasks to practice. There is one of them: Correct 阅读全文

摘要： 1.BFS是用来搜索最短径路的解是比较合适的，比如求最少步数的解，最少交换次数的解，因为BFS搜索过程中遇到的解一定是离根最近的，所以遇到一个解，一定就是最优解，此时搜索算法可以终止。这个时候不适宜使用DFS，因为DFS搜索到的解不一定是离根最近的，只有全局搜索完毕，才能从所有解中找出离根的最近的解 阅读全文

摘要： Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a numb 阅读全文

摘要： 在一个给定形状的棋盘（形状可能是不规则的）上面摆放棋子，棋子没有区别。要求摆放时任意的两个棋子不能放在棋盘中的同一行或者同一列，请编程求解对于给定形状和大小的棋盘，摆放k个棋子的所有可行的摆放方案C。 Input 输入含有多组测试数据。 每组数据的第一行是两个正整数，n k，用一个空格隔开，表示了将 阅读全文

摘要： Problem Description In China, foreign brand commodities are often much more expensive than abroad. The main reason is that we Chinese people tend to t 阅读全文

摘要： Description You are assigned to design network connections between certain points in a wide area. You are given a set of points in the area, and a set 阅读全文

摘要： Description 城市C是一个非常繁忙的大都市，城市中的道路十分的拥挤，于是市长决定对其中的道路进行改造。城市C的道路是这样分布的：城市中有n个交叉路口，有些交叉路口之间有道路相连，两个交叉路口之间最多有一条道路相连接。这些道路是双向的，且把所有的交叉路口直接或间接的连接起来了。每条道路都有一 阅读全文

摘要： There is a pile of n wooden sticks. The length and weight of each stick are known in advance. The sticks are to be processed by a woodworking machine 阅读全文