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

int n, ans;
int a[100005];

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

int calc(int x, int k)
{
	for (int i = 1; i < k; ++i)
		x = sqrt(x);
	return x;
}

int main()
{
	scanf("%d", &n);
	for (int i = 1; i <= n; ++i)
		scanf("%d", a + i);
	sort(a + 1, a + n + 1, cmp);
	for (int i = 1; i <= 6; ++i)
		ans += calc(a[i], i);
	ans += max(n - 6, 0);
	printf("%d\n", ans);
	return 0;
}