Runtime error no compilador do URI, mas em outros funciona normalmente

import java.util.Scanner;
public class Main {

    public static int retornaFib(int number) {
        if (number == 0) {
            return 0;
        }
        else if(number == 1 || number == 2) {
            return 1;
        }
        else {
            return retornaFib(number - 1) + retornaFib(number - 2);         
        }
    }

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()) {
            System.out.println(retornaFib(retornaFib(scan.nextInt())) % scan.nextInt());
        }
        scan.close();
    }
}