增量法的最小包围圈算法,不会…… #include <cstdio> #include <cstring> #include <iostream> #include <cmath> #include <algorithm> using namespace std; const double EPS = 1e-10; inline int sgn(double x) { return (x > EPS) - (x < -EPS);} s…

称号: Maple trees Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 177 Accepted Submission(s): 63   Problem Description There are a lot of trees in HDU. Kiki want to surround all the trees with the m…

Maple trees Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1847    Accepted Submission(s): 574 Problem Description There are a lot of trees in HDU. Kiki want to surround all the trees with the…

Maple trees Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 222 Accepted Submission(s): 79   Problem Description There are a lot of trees in HDU. Kiki want to surround all the trees with the minim…

H - Visible Trees Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 2841 Description There are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) poi…

题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=2841 题意:给n*m的矩阵(从(1,1)开始编号)格子,每个格子有一棵树,人站在(0,0)的位置,求可以看到多少棵树.同一直线上的树只能看到最靠近人的那颗. 思路:可以将题目转化为求gcd(x, y) = 1,(1 <= x <= n, 1 <= y <= m)的对数.直接套用莫比乌斯反演即可. code: #include <cstdio> #include <cs…

http://www.cnblogs.com/keam37/p/3639294.html keam所有 转载请注明出处 Problem Description Give you two definitions tree and rooted tree. An undirected connected graph without cycles is called a tree. A tree is called rooted if it has a distinguished vertex r c…

标题效果:给你个m*n方格,广场格从(1,1)开始. 在树中的每个点,然后让你(0,0)点往下看,问:你能看到几棵树. 解题思路:假设你的视线被后面的树和挡住的话以后在这条线上的树你是都看不见的啊.挡住的话就是这个小的方格内对角线的连线过顶点,如图: watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQveHUxMjExMDUwMTEyNw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/g…

Visible Trees Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Problem Description There are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) point. He wonders how ma…

Disharmony Trees Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 663    Accepted Submission(s): 307 Problem Description One day Sophia finds a very big square. There are n trees in the square. T…