#include <bits/stdc++.h>
#define ll long long
#define endl '\n'
using namespace std;
int n;
ll a[11000];
bool cmp(int a,int b)
{
	return a>b;
}

int main()
{
	cin >> n;
	for (int i=1;i<=n;i++)
	{
		cin >> a[i];
	}
	sort(a+1,a+1+n,cmp);
	ll sum=0;
	for (int i=1;i<=n;i++)
	{
		for (int j=1;j<i;j++)
		{
			a[i]=sqrt(a[i]);
		}
		sum+=a[i];
	}
	cout << sum;
    return 0;
}