#include <bits/stdc++.h>
#define ll long long
#define ld long double
using namespace std;

int n,a[100010];

bool cmp(int x,int y) {
	return x > y;
}

int main() {
	scanf("%d",&n);
	for (int i=1;i<=n;i++)
		scanf("%d",&a[i]);
	sort(a+1,a+n+1,cmp);
	int sum = 0,cnt = 0;
	for (int i=1;i<=n;i++) {
		for (int j=1;j<=cnt&&a[i]>1;j++)
			a[i] = (int)sqrt(a[i]);
		cnt++,sum += a[i];
		if (a[i] <= 1) {
			sum += n-i;
			break;
		}
	}
	printf("%d\n",sum);
}