题意 PDF 分析 炸连续的比炸单独的好. 二分答案,每种炸连续的构成一些半平面,判断半平面交是否为空. 时间复杂度\(O(T n \log^2)\) 代码 这题卡常,排序的时候必须事先算出幅角,不然会TLE. #include<iostream> #include<cstdio> #include<cstdlib> #include<cmath> #include<set> #include<map> #include<que…

poj   1251  Jungle Roads  (最小生成树) Link: http://poj.org/problem?id=1251 Jungle Roads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 23507   Accepted: 11012 Description The Head Elder of the tropical island of Lagrishan has a problem. A b…

Jungle Roads Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7096    Accepted Submission(s): 5185 Problem Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of…

Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villages some years ago. But the jungle overtakes roads relentlessly, so the large road network is too expensi…

D - Jungle Roads Time Limit:1000MS     Memory Limit:10000KB     64bit IO Format:%I64d & %I64u Submit Status Practice POJ 1251 Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extr…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1301 The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villages some years ago. But the jungle overtakes roads relentlessly,…

Jungle Roads 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/A http://acm.hust.edu.cn/vjudge/contest/124434#problem/L Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on e…

注意: 注意数组越界问题(提交出现runtimeError代表数组越界) 刚开始提交的时候,边集中边的数目和点集中点的数目用的同一个宏定义,但是宏定义是按照点的最大数定义的,所以提交的时候出现了数组越界问题,以后需要注意啦. Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads betwe…

这道题一定要注意录入方式,我用的解法是prime算法 因为单个字符的录入会涉及到缓冲区遗留的空格问题,我原本是采用c语言的输入方法录入数据的,结果对了,但是提交却一直wrong,后来改成了c++的cin方法来录入,就对了 先把提交对的代码和提交错的代码都放上来,欢迎提出建议 prime算法: 1:清空生成树,任取一个顶点加入生成树 2:在那些一个顶点在生成树中,一个顶点不在生成树的边中,选取一条权最小的边,将他和另一个端点加入生成树 3:重复步骤2,直到所有的点都进入了生成树为止,此时的生成树就…

Jungle Roads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19536   Accepted: 8970 Description The Head Elder of the tropical island of Lagrishan has a problem. A burst of foreign aid money was spent on extra roads between villages some…