using System;
using System.Linq;

namespace _526
{
    class Program
    {
        static void Main(string[] args)
        {
            int[] x = Console.ReadLine().Split().Select(int.Parse).ToArray();
            long[] dp = new long[x[0]]; dp[0] = 0; dp[1] = 1;
            for (int i = 2; i < x[0]; i++)
            {
                dp[i] = (dp[i - 2] + dp[i - 1]) % x[1];
            }
            Console.WriteLine(dp[x[0] - 1]);
        }
    }
}