#include<iostream>
#include<iomanip>
#include<cmath>
using namespace std;
int main()
{
	double R[1000],r; int n[1000],i;
	const double pi=3.14159265358979323846264338327950288;
    　　　int N;
	cin>>N;
	for(i=1;i<=N;i++)cin>>R[i]>>n[i];
	for(i=1;i<=N;i++)
	{
		r=(1-1/(1+sin(pi/n[i])))*R[i];
        cout<<"Scenario #"<<i<<":"<<endl;
		cout<<setiosflags(ios::fixed)<<setprecision(3);
		cout<<r<<endl;
		cout<<endl;
	}
	return 1;
}

• Re:请大牛帮我找找错!!我两次Wrong Answer了！！！谢谢！！！ (492) 123456sb 2007-08-15 22:39:34