import java.util.Scanner;

public class No526 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long N = sc.nextLong();
		long M = sc.nextLong();

		System.out.println(fibonacci(N,M));
	}
	
	static long fibonacci(long N,long M) {
		if(N == 1) {
			return 0;
		}
		if(N == 2) {
			return 1;
		}
		long F,Fn1,Fn2;
		F = 1;Fn1 = 0;
		for(int i = 3;i <= N;i++) {
			Fn2 = Fn1 % M;
			Fn1 = F % M;
			F = (Fn1 + Fn2) % M;
		}
		return F;
	}
}