using System;
using System.Collections.Generic;

namespace No702
{
    public class Program
    {
        public static void Main(string[] args)
        {
            const int A = 10000001;
            const uint Min = 2100000000;
            const uint Max = 2200000000;

            var seed = uint.Parse(Console.ReadLine());
            var xorShift = new XorShift(seed);
            var list = new List<uint>(A + 10);
            var offset = 0;

            for (var i = 0; i < A; i++)
            {
                var gen = xorShift.Generate();
                if (gen < Min) offset++;
                if (gen < Min || Max < gen) continue;
                list.Add(gen);
            }

            list.Sort();
            Console.WriteLine(list[A / 2 - offset]);
        }
    }

    public class XorShift
    {
        uint x = 0, y = 1, z = 2, w = 3;

        public XorShift(uint seed)
        {
            x = seed;
        }

        public uint Generate()
        {
            var t = x ^ (x << 11);
            x = y;
            y = z;
            z = w;
            w = w ^ (w >> 19) ^ t ^ (t >> 8);
            return w;
        }
    }
}