8_3hunan_9.cpp

杭州电子科技大学ACM-OJ系统的部分代码

#include <iostream>
#include <cmath>
#include  <algorithm>
#include <functional>
#include<numeric>
#include <iomanip>
using namespace std;
double ss(double a,double b)
{
	double m;
	m=sqrt(a*b);
	m*=2;
	return m; 
}
int main()
{
	double *a;
	int i,n;
	double h;
	while(cin>>n)
	{
		a=new double[n];
		
		for(i=0;i<n;i++)	
		{
			cin>>a[i];
		}
		if(n==1)
			h=a[0];
		else
		{
		sort(a,a+n,greater<double>());
		  h=ss(double(a[0]),double(a[1]));
		for(i=2;i<n;i++)
		{	
			h=ss(h,a[i]);
		}
		}
		cout<<fixed<<setprecision(3)<<h<<endl;
		
	}
	return 0;
	
}