import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		long M = scan.nextLong();
		scan.close();
		long []F = new long[N];
		F[0] = 0;
		F[1] = 1;
		for(int i = 2; i < N; i++) {
			F[i] = (F[i - 1] + F[i - 2]) % M;
		}
		System.out.println(F[N - 1]);
	}
}