import java.util.Scanner;

public class Main {
	static Scanner in = new Scanner(System.in);
	public static void main(String[] args){
		int n = in.nextInt(), m = in.nextInt();
		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]);
	}
	

}