using System;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Numerics;
using System.Linq.Expressions;
using System.Linq;
using System.Diagnostics;
public class Csharp_Work
{    
    static long m;
    static long[, ] Mul(long[, ] a, long[, ] b)
    {
        var res = new long[a.GetLength(0), b.GetLength(1)];
        for(int i = 0; i < a.GetLength(0); ++i) {
            for(int j = 0; j < b.GetLength(1); ++j) {
                for(int k = 0; k < a.GetLength(1); ++k) {
                    res[i, j] += a[i, k] * b[k, j];
                    res[i, j] %= m;
                }
            }
        }
        return res;
    }
    // 正方行列の累乗
    static long[, ] Pow(long[, ] a, long n)
    {
        long lng = a.GetLength(0);
        var res = new long[lng, lng];
        var a_tmp = a.Clone() as long[, ];
        // 単位行列
        for(int i = 0; i < lng; ++i) {
            res[i, i] = 1;
        }
        long num = n;
        while(num > 0) {
            if((num & 1) != 0) {
                res = Mul(res, a_tmp);
                num -= 1;
                continue;
            }
            a_tmp = Mul(a_tmp, a_tmp);
            num >>= 1;
        }
        return res;
    }
    static void Main(string[] args)
    {
        var fibo = new long[2, 2];
        fibo[0, 0] = 1;
        fibo[0, 1] = 1;
        fibo[1, 0] = 1;
        fibo[1, 1] = 0;
        var tmp = Console.ReadLine().Split();
        long n = long.Parse(tmp[0]);
        m = long.Parse(tmp[1]);
        var res = Pow(fibo, n - 2);
        Console.WriteLine(res[0, 0]);
    }   
}