using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static long[] NList => ReadLine().Split().Select(long.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var d = 31 - c[0] + c[1];
        if (c[2] <= d) WriteLine(1);
        else if (c[3] <= d) WriteLine(2);
        else WriteLine(3);
    }
}