#include <iostream>
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
ll n, sum;
const int N = 1e5 + 20;
ll a[N];
bool cmp(ll a, ll b) {
	return a > b;
}
int main() {
	cin >> n;
	for (ll i = 1; i <= n; i++) {
		cin >> a[i];
	}
	sort(a + 1, a + n + 1, cmp);
	for (ll i = 1; i <= n; i++) {
		ll x = a[i];
		for (ll j = 1; j < i; j++) {
			x = (ll)sqrt(x);
		}
		sum += x;
	}
	cout << sum;
	return 0;
}