Color the ball 我真的该认真的复习一下以前没懂的知识了,今天看了一下线段树,以前只会用模板,现在看懂了之后,发现还有这么多巧妙的地方,好厉害啊 所以就应该尽量搞懂 弄明白每个知识点 [题目链接]Color the ball [题目类型]线段树区间更新 &题意: N个气球排成一排,从左到右依次编号为1,2,3....N.每次给定2个整数a b(a <= b),lele便为骑上他的"小飞鸽"牌电动车从气球a开始到气球b依次给每个气球涂一次颜色.但是N次以后lel
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5023 解题报告:一面墙长度为n,有N个单元,每个单元编号从1到n,墙的初始的颜色是2,一共有30种颜色,有两种操作: P a b c 把区间a到b涂成c颜色 Q a b 查询区间a到b的颜色 线段树区间更新,每个节点保存的信息有,存储颜色的c,30种颜色可以压缩到一个int型里面存储,然后还有一个tot,表示这个区间一共有多少种颜色. 对于P操作,依次往下寻找,找要更新的区间,找到要更新的区间之前
一开始这条链子全都是1 #include<stdio.h> #include<string.h> #include<algorithm> #include<math.h> #include<map> using namespace std; ///线段树 区间更新 #define MAX 100050 struct node { int left; int right; int mark; int total; }; node tree[MAX*
Description 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 in a given interval. The other is to ask for the sum of numbers in a given interval. In
Description You are given circular array a0, a1, ..., an - 1. There are two types of operations with it: inc(lf, rg, v) - this operation increases each element on the segment [lf, rg] (inclusively) by v; rmq(lf, rg) - this operation returns minimal v
Description 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 in a given interval. The other is to ask for the sum of numbers in a given interval. 题意
Description: 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
题目链接 Description During the War of Resistance Against Japan, tunnel warfare was carried out extensively in the vast areas of north China Plain. Generally speaking, villages connected by tunnels lay in a line. Except the two at the ends, every village
敌兵布阵 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 87684 Accepted Submission(s): 36912 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
Brainman Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 10575 Accepted: 5489 Description BackgroundRaymond Babbitt drives his brother Charlie mad. Recently Raymond counted 246 toothpicks spilled all over the floor in an instant just b
An easy problem A Time Limit: 2000/1000MS (Java/Others) Memory Limit: 65535/65535KB (Java/Others) Submit Status N个数排成一列,Q个询问,每次询问一段区间内的数的极差是多少. Input 第一行两个整数N(1≤N≤50000),Q(1≤Q≤200000).接下来一行N个整数a1 a2 a3 ....an,(1≤ai≤1000000000).接下来Q行,每行两个整数L,R(1≤L