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

class Solution
{
    static Dictionary<int, int> memo = new Dictionary<int, int>();

    static int GetFib(int n, int m)
    {
        if(n == 1)
        {
            return 0;
        }

        if (n == 2)
        {
            return 1%m;
        }

        if (memo.ContainsKey(n))
        {
            return memo[n];
        }
        
        var fib = (GetFib(n - 1,m) + GetFib(n - 2, m))% m;
        memo[n] = fib;
        return fib;
    }

    static void Main()
    {
        var vals = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
        var n = vals[0];
        var m = vals[1];
        
        Console.WriteLine(GetFib(n,m));
    }
}