import java.util.*;
public class Main
{
public static void main (String[]args)
{
Scanner sc = new Scanner (System.in);
int n = sc.nextInt ();
int a = sc.nextInt ();
int b = sc.nextInt ();
int c = sc.nextInt ();
int count = 0;
int arr[] = { a, b, c };
Arrays.sort (arr);
if (arr[0] >= n)
{
System.exit (0);
}
else
{
for (int i = 0; i < 2; i++)
{
if(n > 0)
{
n = n - arr[i];
count++;
}
}
System.out.println(count);
}
}
}