package yukicoder;

import java.util.Scanner;

public class No526 {
    private long n, m, fib1, fib2, fib3;

    public static void main(String[] args) {
        No526 main = new No526();
        main.run();
    }

    private void run() {
        Scanner sc = new Scanner(System.in);
        n = sc.nextLong();
        m = sc.nextLong();

        fib1 = 0;
        fib2 = 1;
        for(int i = 0; i < n - 2; i++) {
            fib3 = (fib1 + fib2) % m;
            fib1 = fib2;
            fib2 = fib3;
        }

        if(n == 1) {
            System.out.println(0);
        } else if(n == 2) {
            System.out.println(1 % m);
        } else {
            System.out.println(fib3 % m);
        }
    }
}