Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

注意r是double类型

Posted by pudding110 at 2011-03-16 20:15:49 on Problem 2365
AC代码
#include <iostream>
#include <cstring>
#include <string>
#include <stdio.h>
#include <stdlib.h>
#include <cmath>
using namespace std;
double pi=3.141592653589793;

int main()
{
	int n,i;
	double sum,r;
	double data[501][2];
	while(scanf("%d %lf",&n,&r)!=EOF)
	{
		sum=0;
		for(i=0;i<n;i++)
		{
			scanf("%lf %lf",&data[i][0],&data[i][1]);
			if(i>0)
				sum +=sqrt(pow(data[i][0]-data[i-1][0],2)+pow(data[i][1]-data[i-1][1],2));
		}
		sum+=sqrt(pow(data[n-1][0]-data[0][0],2)+pow(data[n-1][1]-data[0][1],2));
		sum+=2*pi*r;
		printf("%.2lf\n",sum);

	}
	return 0;
}

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator