using System;

class B
{
	static int[] Read() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
	static (int, int) Read2() { var a = Read(); return (a[0], a[1]); }
	static void Main() => Console.WriteLine(Solve());
	static object Solve()
	{
		var (n, m) = Read2();
		return CreateSeqWithMod(n - 1, m)[^1];
	}

	public static long[] CreateSeqWithMod(int nLast, long mod)
	{
		var a = new long[nLast + 1];
		a[1] = 1;
		for (int i = 2; i <= nLast; i++)
			a[i] = (a[i - 1] + a[i - 2]) % mod;
		return a;
	}
}