Description You've recently started an ice-cream business in a local school. During a day you have many suppliers delivering the ice-cream for you, and many students buying it from you. You are not allowed to set the prices, as you are told the price…

531. Bonnie and Clyde 题目连接: http://acm.sgu.ru/problem.php?contest=0&problem=531 Description Bonnie and Clyde are into robbing banks. This time their target is a town called Castle Rock. There are n banks located along Castle Rock's main street; each…

题目大意: n个矩形,将一个大矩形分成 n+1 块.矩形之间不重合,可是包括.求这n+1个矩形的面积 思路分析: 用线段树记录他们之间的父子关系.然后dfs 计算面积. 当给出的矩形上边的时候,就要记录到该矩形的父亲去. #include <cstdio> #include <iostream> #include <cstring> #include <algorithm> #define lson num<<1,s,mid #define rs…

题目链接 set维护最小值贪心, 刚开始用树的直径+单调队列没调出来... #include <iostream>#include <cstdio> #include <set> #define REP(i,a,n) for(int i=a;i<=n;++i) #define x first #define y second using namespace std; typedef pair<int,int> pii; , INF = 0x3f3f3f…

3252: 攻略 Time Limit: 10 Sec  Memory Limit: 128 MBSubmit: 339  Solved: 130[Submit][Status][Discuss] Description 题目简述:树版[k取方格数]   众所周知,桂木桂马是攻略之神,开启攻略之神模式后,他可以同时攻略k部游戏. 今天他得到了一款新游戏<XX半岛>,这款游戏有n个场景(scene),某些场景可以通过不同的选择支到达其他场景.所有场景和选择支构成树状结构:开始游戏时在根节点(共通…

3252: 攻略 Time Limit: 10 Sec  Memory Limit: 128 MBSubmit: 562  Solved: 238[Submit][Status][Discuss] Description 题目简述:树版[k取方格数]   众所周知,桂木桂马是攻略之神,开启攻略之神模式后,他可以同时攻略k部游戏. 今天他得到了一款新游戏<XX半岛>,这款游戏有n个场景(scene),某些场景可以通过不同的选择支到达其他场景.所有场景和选择支构成树状结构:开始游戏时在根节点(共通…

311. Ice-cream Tycoon Time limit per test: 0.5 second(s)Memory limit: 65536 kilobytes input: standardoutput: standard You've recently started an ice-cream business in a local school. During a day you have many suppliers delivering the ice-cream for y…

题目链接:http://acm.sgu.ru/problem.php?contest=0&problem=180 解题报告:一个裸的求逆序对的题,离散化+线段树,也可以用离散化+树状数组.因为这题中的数列有重复的而且范围特别大,所以要进行离散化,离散化的方法是, 首先按照输入的数字排个序,然后把整个数列扫一遍,得出每个数字离散化的结果,然后再按照输入的顺序把顺序调整回来就OK 了.线段树部分就不说了. #include<cstdio> #include<cstring> #…

319. Kalevich Strikes Back Time limit per test: 0.5 second(s)Memory limit: 65536 kilobytes input: standardoutput: standard And yet again the Berland community can see that talent is always multi-sided. The talent is always seeking new ways of self-ex…

https://www.lydsy.com/JudgeOnline/problem.php?id=5017 暴力: 对于每一个炸弹,枚举所有的炸弹,看它爆炸能不能引爆那个炸弹 如果能,由这个炸弹向引爆的炸弹连单向边 tarjan所点后拓扑排序 在拓扑图上倒着统计答案 可以得到一个炸弹能引爆的编号最小mi和最大的炸弹mx,mx-mi+1就是先引爆这个炸弹一共能引爆的炸弹数 优化: 一个炸弹一定是向一段区间连边 所以用线段树优化,这样向一个区间连边就变成了向一个点连边 注意存边的空间一定要开的足够大…