A Simple Problem with Integers Time Limit: 5000MS   Memory Limit: 131072K Total Submissions: 140120   Accepted: 43425 Case Time Limit: 2000MS Description You have N integers, A1, A2, ... , AN. You need to deal with two kinds of operations. One type o…

Fast Arrangement Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3995    Accepted Submission(s): 1141 Problem Description Chinese always have the railway tickets problem because of its' huge amo…

题意: 有一个n*n的矩阵,初始化全部为0.有2中操作: 1.给一个子矩阵,将这个子矩阵里面所有的0变成1,1变成0:2.询问某点的值 方法一:二维线段树 参考链接: http://blog.csdn.net/xiamiwage/article/details/8030273 思路: 二维线段树,一维线段树的成段更新需要lazy. 引申到二维线段树应该需要一个lazy,一个sublazy,可是这里什么都不用.    奇妙之处在于这题的操作是异或,当某一段区间需要异或操作时候, 不必更新到它所有的…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1166 第一次做线段树,帆哥的一句话,我记下来了,其实,线段树就是一种处理数据查询和更新的手段. 然后,我的代码风格,是网上的大牛们的辛苦总结,我就套用了.这里,我还是简单说一下线段树,说的不好,主要方便自己复习. 线段树,3个步骤,建树,查询,更新, 建树:到底部就是a[]数组的值,建立左右子树后,向上推根,根为左右子树的值 更新:类似建树,二分,找到单点所在区间,更新该区间,记得上一个区间也要变化…

Just a Hook 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 sticks which are of the same length. Now Pudge wants to do some operations on the hook.…

/* HDU 4819 Mosaic 题意:查询某个矩形内的最大最小值, 修改矩形内某点的值为该矩形(Mi+MA)/2; 二维线段树模板: 区间最值,单点更新. */ #include<bits/stdc++.h> using namespace std; const int INF = 0x3f3f3f3f; ; int N, Q; struct Nodey { int l, r; int Max, Min; }; int locx[MAXN], locy[MAXN]; struct Nod…

题目链接:这道题是线段树,树状数组最基础的问题 两种分类方式:按照更新对象和查询对象 单点更新,区间查询; 区间更新,单点查询; 按照整体维护的对象: 维护前缀和; 维护区间最值. 线段树模板代码 #include<iostream> #include<string.h> #include<stdio.h> #include<math.h> #include<algorithm> using namespace std; #define re(i…

线段树是非常有效的数据结构,可以快速的维护单点修改,区域修改,查询最大值,最小值等功能. 同时,它也很重要.如果有一天比赛,你卡在了一道线段树模板题目上,这就真的尴尬了.不过,随着时代的进步,题目也越来越变态,线段树更多时候则是你算法时间复杂度的优化. 这是单点查询的代码. #include <iostream> #include <cstdio> #include <algorithm> using namespace std; int n; ]; struct no…

Attack Time Limit: 5000/3000 MS (Java/Others)    Memory Limit: 65768/65768 K (Java/Others)Total Submission(s): 2496    Accepted Submission(s): 788 Problem Description Today is the 10th Annual of “September 11 attacks”, the Al Qaeda is about to attack…

I Hate It Time Limit: 9000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 102748    Accepted Submission(s): 38640 Problem Description 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…