I am trying to solve the practice problem [CRDGAME](https://www.codechef.com/problems/CRDGAME)
My code is:
/* package codechef; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
int powr(int n){
int sum =0;
while(n>0){
sum+=(n%10);
n/=10;
}
return sum;
}
void game() throws IOException{
BufferedReader br1 = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br1.readLine());
int chef=0,morty=0, a=0,b=0;
for(int i = 1;i<=n;i++){
String str = br1.readLine();
String sr[] = str.split("\\s");
chef = Integer.parseInt(sr[0]);
morty = Integer.parseInt(sr[1]);
chef = powr(chef);
morty = powr(morty);
if(chef>morty){
a++;
}
else{
b++;
}
}
if(a>b){
System.out.println("0 "+a);
}else if(a==b){
System.out.println("2 "+a);
}else{
System.out.println("1 "+b);
}
}
public static void main (String[] args) throws java.lang.Exception
{
Codechef ob = new Codechef();
int t;
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
t = Integer.parseInt(br.readLine());
for(int i=0;i<t;i++){
ob.game();
}
}
}
But it is giving a Non Zero Exit Code error.
The error message is:
Exception in thread "main" java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:542)
at java.lang.Integer.parseInt(Integer.java:615)
at Codechef.game(Main.java:22)
at Codechef.main(Main.java:54)