using System;
using System.Linq;

class Program {
    static void Main() {
        Console.Write("N? ");
        var N = int.Parse(Console.ReadLine());

        Console.Write("Nums (plz input 3 nums)? ");
        var nums = Console.ReadLine().Split(' ').Select(n => int.Parse(n)).ToArray();

        var numCount =
            nums.SelectMany(n =>
                Enumerable.Range(1, N / n).Select(m => n * m)
            ).Distinct()
            .Count();

        Console.WriteLine(numCount);
    }
}