Run Time error when running my JAVA program

Question

Trying to solve the kattis exercise "abc" (https://kau.kattis.com/problems/abc). Program runs fine in eclipse on my computer, but for some reason I get "run time error" when trying to submit my solution online. Any ideas what I should change? See link for problem formulation. As input the program takes 3 integers followed by 3 letters.

public class ABC {

  public static void main(String[] args) {
    int[] list = {0, 0 ,0};
    char[] order = {0 ,0 ,0};
    int  i;

    Scanner ob = new Scanner(System.in);

    for(i=0; i<list.length; i++) 
    {
        int a = ob.nextInt();
         list[i] = a;
    }
    int n=list.length;

    for (i = 0; i < n-1; i++) {

        for (int j = 0; j < n-i-1; j++) {
            if (list[j] > list[j+1]) 
            { 

                int temp = list[j]; 
                list[j] = list[j+1]; 
                list[j+1] = temp; 
            } 
        }
    }
    String s = ob.nextLine();

    for(i=0; i<order.length; i++)
    {
        order[i] = s.charAt(i);
    }

    ob.close();

if(order[0] == 'A' && order[1]=='B')
{
    System.out.print(list[0]+" ");
    System.out.print(list[1]+" ");
    System.out.print(list[2]);
}
if(order[0] == 'A' && order[1]=='C')
{ 
    System.out.print(list[0]+" ");
    System.out.print(list[2]+" ");
    System.out.print(list[1]);
    }
if(order[0] == 'C' && order[1]=='B')
{
    System.out.print(list[2]+" ");
    System.out.print(list[1]+" ");
    System.out.print(list[0]);

}
if(order[0]=='C' && order[1]=='A')
{
    System.out.print(list[2]+" ");
    System.out.print(list[0]+" ");
    System.out.print(list[1]);
}

if(order[0] == 'B' && order[1]=='A')
{ 
    System.out.print(list[1]+" ");
    System.out.print(list[0]+" ");
    System.out.print(list[2]);

}
if(order[0] == 'B' && order[1]=='C')
{ 
    System.out.print(list[0]+" ");
    System.out.print(list[2]+" ");
    System.out.print(list[1]);
}
  }
}

You need to show us the *exact* error. I am not going to sign up just so I can paste your code into their submission system. — Michael, Sep 25 '19 at 17:22
Yes of course not, unfortunately I don't get any feedback from their system, it only tells me why it failed. The answer I got was: "Run Time Error" — johnrandelin, Sep 25 '19 at 17:26
@rekiem87 Yes I have, works fine for me, but not when I submit it online — johnrandelin, Sep 25 '19 at 17:28

score 0 · Accepted Answer · answered Sep 25 '19 at 17:30

That's because the Scanner.nextInt() method does not read the newline character in your input. while taking the string input use

ob.nextLine(); String s = ob.nextLine();

to move to the next line and read the String from the input.

Also using switch case for each char which will make the code better and will prevent writing if conditions again and again. Hope this helps. Cheers!

Run Time error when running my JAVA program

1 Answers1