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 g = new int[64];
        for (var i = 0; i < g.Length; ++i)
        {
            var set = new HashSet<int>();
            for (var j = 0; j < 31; ++j)
            {
                if ((i & (1 << j)) != 0) set.Add(g[j]);
            }
            var tmp = 0;
            while (set.Contains(tmp)) ++tmp;
            g[i] = tmp;
        }
        var n = NN;
        var a = NList;
        var x = 0;
        foreach (var ai in a)
        {
            if (ai < 0) x ^= 1024;
            else
            {
                var set = new HashSet<int>();
                for (var j = 0; j < 61; ++j)
                {
                    if ((ai & (1L << j)) != 0) set.Add(g[j]);
                }
                var tmp = 0;
                while (set.Contains(tmp)) ++tmp;
                x ^= tmp;
            }
        }
        WriteLine(x == 0 ? 2 : 1);
    }
}