using System;
using System.IO;
using System.Linq;

class Program
{
    static void Assert(bool expr, string message)
    {
        if (!expr)
        {
            Console.Error.WriteLine("Error: " + message);
            Environment.Exit(1);
        }
    }

    static Tuple<int, long> GetCheckedInput(string input)
    {
        Assert(input.EndsWith(Environment.NewLine), "No newline");
        var lines = input.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
        Assert(lines.Count() == 2, "Too many inputs");
        var numstrs = lines[0].Split(' ');
        Assert(numstrs.Count() == 2, "Too many inputs");
        Assert(numstrs.All(s => s.All(c => ('0' <= c && c <= '9'))), "Invalid character");
        var n = int.Parse(numstrs.ElementAt(0));
        var m = long.Parse(numstrs.ElementAt(1));
        Assert(10 <= n, "N < 10");
        Assert(n <= 5000000, "N > 5000000");
        Assert(2 <= m, "M < 2");
        Assert(m < 2147483648, "M >= 2^31");
        return Tuple.Create(n, m);
    }

    static long Solve(int n, long m)
    {
        checked
        {
            var fib = new long[3] { 0, 1, 1 };
            for (var i = 3; i < n; i++)
            {
                fib[0] = fib[1];
                fib[1] = fib[2];
                fib[2] = (fib[0] + fib[1]) % m;
            }
            return fib[2];
        }
    }

    static void Main()
    {
        using (var sr = new StreamReader(Console.OpenStandardInput()))
        {
            var rawInput = sr.ReadToEnd();
            var tmp = GetCheckedInput(rawInput);
            var n = tmp.Item1;
            var m = tmp.Item2;
            Console.WriteLine(Solve(n, m));
        }
    }
}