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I would like to know which case this code in Java does not work. I have tried several cases and no meeting which is failing. Can you help me telling which case fails?

The code Java is:

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;

// uva code 10020 ...

Thanks, I was able to fix the problem, but now I have a new problem with the entry:
if not tell me which is the termination condition, as I know I'll finish the entry?

I read only one line?
2 \ n \ n1 \ n-1 0 \ n-5 -3 \ n2 5 \ n0 0 \ n \ n1 \ n-1 0 \ n0 1 \ n0 0

or should I read several lines?

2

1
-1 0
-5 -3
2 5
0 0

1
-1 0
0 1
0 0

If I have the following entry:
2

1
-1 0
-5 -3
2 5
0 0

1
-1 0
0 1
0 0

should read as java?? with a variable BufferedReader and readLine () method and read line by line? or just read a single line in the following format:

2 \ n \ n1 \ n-1 0 \ n-5 -3 \ n2 5 \ n0 0 \ n \ n1 \ n-1 0 \ n0 1 \ n0 0