#include <bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin >> n;
	vector<long long> v(n);
	for(int i = 1; i <= n; i++){
		cin >> v[i];
	}
	auto it = v[1];
	auto it2 = v[n];
	sort(it,it2);
	int sum = 0;
	for(int i = 1; i <= n; i++){
		for(int j = 1; j <= i; j++)
			v[i] = (int)sqrt(v[i]);
		sum += v[i];
	}
	cout << sum; 
}