木子川

摘要： 什么是线段树线段树，是一种二叉搜索树。它将一段区间划分为若干单位区间，每一个节点都储存着一个区间。它功能强大，支持区间求和，区间最大值，区间修改，单点修改等操作。线段树的思想和分治思想很相像。线段树的每一个节点都储存着一段区间[L…R]的信息，其中叶子节点L=R。它的大致思想是：将一段大区间平均地划 阅读全文

摘要： During the Warring States Period of ancient China(476 BC to 221 BC), there were seven kingdoms in China they were Qi, Chu, Yan, Han, Zhao, Wei and Qin 阅读全文

摘要： During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Generally speaking, vil 阅读全文

摘要： A lot of battleships of evil are arranged in a line before the battle. Our commander decides to use our secret weapon to eliminate the battleships. Ea 阅读全文

摘要： For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a game of Ultim 阅读全文

摘要： In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive metallic 阅读全文

摘要： The citizens of Bytetown, AB, could not stand that the candidates in the mayoral election campaign have been placing their electoral posters at all pl 阅读全文

摘要： You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type of operation is to add some given number to each number 阅读全文

摘要： 很多学校流行一种比较的习惯。老师们很喜欢询问，从某某到某某当中，分数最高的是多少。 这让很多学生很反感。 不管你喜不喜欢，现在需要你做的是，就是按照老师的要求，写一个程序，模拟老师的询问。当然，老师有时候需要更新某位同学的成绩。 Input本题目包含多组测试，请处理到文件结束。 在每个测试的第一行， 阅读全文

摘要： 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国都掌握的一清二楚,每个工兵营地的人数都有可能发生 阅读全文