import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

//
// Return the sum of two integers.
//
public class Solution
{
	//
	// Bugs can be found in this method only.
	//
	static int solveMeFirst(int a, int b)
	{
		return a - b;
	}

	//
	// Don't edit any code of this method, necessary for HackerRank API
	//
	public static void main(String[] args)
	{
		Scanner in = new Scanner(System.in);

		String[] numbers = in.nextLine().split(",");

		int a = Integer.parseInt(numbers[0]);
		int b = Integer.parseInt(numbers[1]);

		int sum;

		sum = solveMeFirst(a, b);

		System.out.println(sum);
	}
}

@@ -9,113 +9,484 @@
 ava.
-io.*;%0Aimport java.util.*;%0Aimport java.text.*;%0Aimport java.math.*;%0Aimport java.util.regex.*;%0A%0A//%0A//
+util.*;%0A%0A/**%0A * %0A * Welcome to DebugRank.%0A * %0A * The purpose of the Basic Operator class is to return the sum%0A * of two integers.%0A * %0A * Review the code below and find where the bug exists.%0A * %0A * When you've found and fix the bug simply press the button%0A * in the bottom right hand corner to compile and test your code.%0A * %0A * View test case results and compile error messages%0A * in the tab in the upper right hand corner.%0A *%0A */%0Apublic class BasicOperator%0A%7B%0A%09/**%0A%09 *
  Return
+s
  the
@@ -511,84 +511,113 @@
 rs.%0A
-//%0Apublic class Solution%0A%7B%0A%09//%0A%09// Bugs can be found in this method only.%0A%09/
+%09 * %0A%09 * @param a the first integer.%0A%09 * @param b the second integer.%0A%09 * @return the sum of a and b.%0A%09 *
 /%0A%09s
@@ -626,28 +626,27 @@
 tic int 
-solveMeFi
+addIntege
 rs
-t
 (int a, 
@@ -655,16 +655,43 @@
 t b)%0A%09%7B%0A
+%09%09//hint: this is the bug.%0A
 %09%09return
@@ -708,13 +708,14 @@
 %0A%0A%09/
-/%0A%09//
+**%0A%09 *
  Don
@@ -731,18 +731,22 @@
 ny code 
-of
+inside
  this me
@@ -753,11 +753,15 @@
 thod
-, n
+.%0A%09 * N
 eces
@@ -784,14 +784,49 @@
 ank 
-API%0A%09/
+cloud compiling.%0A%09 * %0A%09 * @param args%0A%09 *
 /%0A%09p
@@ -1059,20 +1059,19 @@
 m = 
-solveMeFi
+addIntege
 rs
-t
 (a, 

update java basic operator