using System;
using System.Linq;
using System.IO;
using System.Collections.Generic;

class Solution
{
    long N, M;
    long[] memo;
    long fib(long i)
    {
        if (i == 0) return 0;
        if (i == 1) return 1;
        if (memo[i] > 0) return memo[i];
        return memo[i] = (fib(i - 1) + fib(i - 2)) % M;
    }
    public void solve(TextReader input, TextWriter output)
    {
        string[] lines = input.ReadLine().Split(' ');
        N = long.Parse(lines[0]);
        M = long.Parse(lines[1]);
        memo = new long[N + 1];
        output.WriteLine(fib(N-1));
    }
}

class CaideConstants {
    public const string InputFile = null;
    public const string OutputFile = null;
}
public class Program {
    public static void Main(string[] args) {
        Solution solution = new Solution();
        using (System.IO.TextReader input =
                CaideConstants.InputFile == null ? System.Console.In :
                        new System.IO.StreamReader(CaideConstants.InputFile))
        using (System.IO.TextWriter output =
                CaideConstants.OutputFile == null ? System.Console.Out:
                        new System.IO.StreamWriter(CaideConstants.OutputFile))

            solution.solve(input, output);
    }
}