#include<bits/stdc++.h>
#define ll long long
using namespace std;
struct apple{
	int now;
	int nextdaylow;
};
apple a[100005];
bool cmp(apple x,apple y){
	return x.nextdaylow > y.nextdaylow;
}
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0),cout.tie(0);
	int n;
	cin>>n;
	for(int i = 0;i < n;i++){
		cin>>a[i].now;
		a[i].nextdaylow = a[i].now - (int)sqrt(a[i].now);
	}
	int k = n;
	sort(a,a + n,cmp);
	int ans = 0;
	for(int i = 0;i < n;i++){
		ans += a[i].now;
		for(int j = i + 1;j < n;j++){
			a[j].now -= a[j].nextdaylow;
			a[j].nextdaylow = a[j].now - (int)sqrt(a[j].now); 
		}
	}
	cout<<ans; 
	return 0;
}