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

public class Program
{

    public void Proc()
    {
        int[] inpt = Reader.ReadLine().Split(' ').Select(a => int.Parse(a)).ToArray();
        int num = inpt[0];
        this.Mod = inpt[1];

        long ans = GetAns(num);
        Console.WriteLine(ans);

    }

    private Dictionary<int, long> dic = new Dictionary<int, long>();

    private long GetAns(int num) {
        if(num <= 1) {
            return 0;
        }
        if(num == 2) {
            return 1;
        }

        if(dic.ContainsKey(num)) {
            return dic[num];
        }
        long ans = (GetAns(num - 1) + GetAns(num - 2)) % Mod;
        dic[num] = ans;
        return ans;
    }

    private int Mod = 0;

    public class Reader
	{
		private static StringReader sr;
		public static bool IsDebug = false;
		public static string ReadLine()
		{
			if (IsDebug)
			{
				if (sr == null)
				{
					sr = new StringReader(InputText.Trim());
				}
				return sr.ReadLine();
			}
			else
			{
				return Console.ReadLine();
			}
		}
		private static string InputText = @"



10 20





";
	}

	public static void Main(string[] args)
	{
#if DEBUG
		Reader.IsDebug = true;
#endif
		Program prg = new Program();
		prg.Proc();
	}
}