#include <iostream>
#include <cstdlib>
#include <cmath>
#include <iomanip>

using namespace std;

int cmp(const void *a,const void *b)
{
	return -(*(int*)a-*(int*)b);
}

void main()
{
	int num[100];
	int n;
	int i;
	double sum;
	cin>>n;
	cout<<setiosflags(ios::fixed);
	while(cin)
	{
		for(i=0;i<n;i++)
			cin>>num[i];
		if(n==1)
		{	
			cout<<setprecision(3)<<double(num[0])<<endl;
			continue;
		}
		qsort(num,n,sizeof(int),cmp);
		sum=2*sqrt(double(num[0]*num[1]));
		for(i=2;i<n;i++)
			sum=2*sqrt(double(sum*num[i]));
		cout<<setprecision(3)<<sum<<endl;
		cin>>n;
	}
}

• Re:哪位高手看看呀 为什么总是WA (1262) mcgrady118 2008-07-24 00:44:51