Description 与当地鞋匠协会发生冲突的瓦维尔城堡的龙决定将它的狩猎场移出克拉科夫以减少敌对的邻居数量.现在他正在给和平而宁静的Bytes王国带来灾难与恐怖. 在Bytes王国有n条河流,每一条河流都是一条直线(你可以认为Bytes王国就像是欧几里得平面上被一些直线划分的一些区域),不存在三条河流共用同一个点,河流们将王国划分成了一些区域. 幸运的是,现在王国里有m个勇士.每个勇士都发誓要保护其所在的区域.王国也许就因此受到了长远持久的保护? 我们所知道的只有龙不会攻击存在至少一个勇士的…
题意:给n条直线,将一个平面分成很多个部分,再给m个骑士的坐标,在一个部分内只要有一个骑士即可保护该部分,问给出的m个骑士是不是保护了所有部分. 解法:计算每个骑士与每条直线的位置关系(上面还是下面),用0,1表示,所以每个骑士会有一个01串,最后统计出这n条直线分成的部分数(可能有平行的),然后排序每个骑士的01串,看有多少个处在不同部分的骑士(01串不同的个数),然后比较个数关系,得出答案. 代码: #include <iostream> #include <cstdio> #…
一个简单的题: 感觉像计算几何,其实并用不到什么计算几何的知识: 方法: 首先对每条边判断一下,看他们能够把平面分成多少份: 然后用边来对点划分集合,首先初始化为一个集合: 最后如果点的集合等于平面的份数,就说明每块都有一个士兵: 代码: #include<cstdio> #include<vector> #define maxn 105 #define maxm 50005 using namespace std; int a[maxn],b[maxn],c[maxn]; lon…
Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…
要back的题目 目标是全绿!back一题删一题! acmm7 1003 1004 acmm8 1003 1004 sysu20181013 Stat Origin Title Solved A Gym 100624A Kingdoms   B Gym 100624B Who wants to live forever? Solved C Gym 100624C Chemist's vows   D Gym 100624D Non-boring sequences Attempted E Gym…
---恢复内容开始--- 题目: Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese. Due to the lack of predators, the geese pop…
Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese. Due to the lack of predators, the geese population was out o…
  The Dragon of Loowater Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese. Due to the lack of predators, the g…
Problem C: The Dragon of Loowater Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese. Due to the lack of predato…
Problem C: The Dragon of Loowater Once upon a time, in the Kingdom of Loowater, a minor nuisance turned into a major problem. The shores of Rellau Creek in central Loowater had always been a prime breeding ground for geese. Due to the lack of predato…