SPOJ.com - Problem JULKA

import java.math.BigInteger;
import java.io.*;
public class Main{
public static void main(String args[]){
try{
int t = 10;
while(t>0){
BufferedReader br = new BufferedReader(new InputStreamReader(System.in) );
BigInteger b = new BigInteger( br.readLine() );
BigInteger m = new BigInteger( br.readLine() );
BigInteger kl = BigInteger.ZERO;
kl = b.add(m).divide( new BigInteger(“2”) );
System.out.println(kl);
System.out.println(kl.subtract(m));
t -=1;
}
}catch(Exception e){
return;
}

}

}

I’m getting wa. Please help. Thanks