#include<bits/stdc++.h>
#define int long long
using namespace std;
int n,a[100010],ans = 0;
bool cmp(int a,int b){return a > b;}
signed main(){
	cin >> n;
	for(int i = 1;i <= n;i++) cin >> a[i];
	sort(a + 1,a + n + 1,cmp);
	for(int i = 1;i <= n;i++){
		ans += a[i];
		for(int j = i + 1;j <= n;j++) a[j] = sqrt(a[j]);
	}
	cout << ans << endl;
	return 0;
}