Chosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here, we get a new problem. There is a very long board with length L centimeter, L is a positive integer, so we can evenly divide the bo…

POJ 2777 Count Color --线段树Lazy的重要性 原题 链接:http://poj.org/problem?id=2777 Count Color Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 59087 Accepted: 17651 Description Chosen Problem Solving and Program design as an optional course, you are…

http://poj.org/problem?id=2777 题目大意 涂颜色,输入长度,颜色总数,涂颜色次数,初始颜色都为1,然后当输入为C的时候将x到y涂为颜色z,输入为Q的时候输出x到y的颜色总数 很明显的区间线段树,然后加lazy思想记录 lazy操作为了避免查找到每一个子节点区间而费时,将查找到的区间作标记,但查找到这个区间或还要继续像下查找的时候 将此区间的数据传给下面两个区间树 因为这题颜色总类只有30种很少,所以偷了个懒,将判断与记录操作合并到一个结构体上了,然后用类似hash的…

Count Color Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 42507   Accepted: 12856 Description Chosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here, we get a new problem.…

题意: 给你一个长度为N的线段数,一开始每个树的颜色都是1,然后有2个操作. 第一个操作,将区间[a , b ]的颜色换成c. 第二个操作,输出区间[a , b ]不同颜色的总数. 直接线段树搞之.不过输入有个坑,a 可能大于b ,所以要判断一下. #include <iostream> #include <cstdio> #include <algorithm> #include <string> #include <cmath> #inclu…

Count Color Time Limit: 1000 MS Memory Limit: 65536 KB 64-bit integer IO format: %I64d , %I64u Java class name: Main [Submit] [Status] [Discuss] Description Chosen Problem Solving and Program design as an optional course, you are required to solve al…

敲了n遍....RE愉快的debug了一晚上...发现把#define maxn = 100000 + 10 改成 #define maxn = 100010 就过了....感受一下我呵呵哒的表情.... 貌似这个题用了很经典的线段树和位运算.懂了.但不是很懂.确实觉得用的很巧妙.只想说.好坑. #include<iostream> #include<cstdio> #include<cstring> using namespace std; #define N = 1…

题意:有一个长板子,分成多段,有两种操作,第一种是C给从a到b那段染一种颜色c,另一种是P询问a到b有多少种不同的颜色.Sample Input2 2 4  板长 颜色数目 询问数目C 1 1 2P 1 2C 2 2 2P 1 2Sample Output21 sum用二进制记录区间内颜色状态,col记录染上的颜色(其他颜色会被染上的颜色完全覆盖) 2015-07-23:专题复习 #include<cstdio> #include<iostream> #include<alg…

Who Gets the Most Candies? Time Limit: 5000MS   Memory Limit: 131072K Total Submissions: 12744   Accepted: 3968 Case Time Limit: 2000MS Description N children are sitting in a circle to play a game. The children are numbered from 1 to N in clockwise…

HDU.1556 Color the ball (线段树 区间更新 单点查询) 题意分析 注意一下pushdown 和 pushup 模板类的题还真不能自己套啊,手写一遍才行 代码总览 #include <bits/stdc++.h> #define nmax 200000 using namespace std; struct Tree{ int l,r,val; int lazy; int mid(){ return (l+r)>>1; } }; Tree tree[nmax&…