#include<stdio.h>
int main()
{
	long long int n, a, b, c;
	scanf("%lld%lld%lld%lld", &n, &a, &b, &c);
	long long int i, j, k;
	long long int ans = 0, v;
	for (i = 0; i <= n; i += 3)
	{
		if (2 * b < c)
		{
			k = (n - i) / 10 * 10;
			j = (n - i - k) / 5 * 5;
		}
		else
		{
			j = (n - i) / 5 * 5;
			k = (n - i - j) / 10 * 10;
		}
		v = a * i / 3 + b * j / 5 + c * k / 10;
		if (ans < v)
			ans = v;
	}
	printf("%lld\n", ans);
	return 0;
}