import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long m = sc.nextInt();
        if (n == 1) {
            System.out.println(0);
            return;
        } else if (n == 2) {
            System.out.println(1);
            return;
        }
        long prepre = 0;
        long pre = 1;
        for (int i = 3; i <= n; i++) {
            long cur = (prepre + pre) % m;
            prepre = pre;
            pre = cur;
        }
        System.out.println(pre);
    }
}