import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String[] str=sc.nextLine().split(" ");
		int[] num=new int[2];
		num[0]=Integer.parseInt(str[0]);
		num[1]=Integer.parseInt(str[1]);
		sc.close();
		long tmp1=0,tmp2=1;
		int count=2;
		while(count++<num[0]){
			long tmp=tmp1;
			tmp1=tmp2%num[1];
			tmp2=(tmp2+tmp)%num[1];
		}
		System.out.println(tmp2%num[1]);
	}
}