OJ Board

I keep getting Runtime Error even when i have tried all the tests that ive found on the board and got the correct outputs.
I'm using double and before ive tried using Big Int and i was getting the same error. Can somebody help me and tell me what is wrong? The code seems good to me.
Thank you in ...

hello! im kind of new here, i was trying to solve this problem in Java but i got a time limit exceeded :/
can anyone tell me why?

import java.util.ArrayList;
import java.util.Scanner;


public class Main {

public static void main(String[] args) {

Scanner in = new Scanner(System.in ...