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public int do_operation(int a, int b) throws ArithmeticException {
   long temp = (long)a + (long)b;
   if(temp > Integer.MAX_VALUE || temp < Integer.MIN_VALUE) {
     throw new ArithmeticException("Not in range");
   }
   return (int)temp; // Value within range; can perform the addition
}

public int do_operation(int a, int b) throws ArithmeticException {
  if( b>0 ? a > Integer.MAX_VALUE - b : a < Integer.MIN_VALUE - b ) {
    throw new ArithmeticException("Not in range");
  }
  return a + b;  // Value within range so addition can be performed
}

public int do_operation(int a, int b) throws ArithmeticException {
  if(b > 0 ? a < Integer.MIN_VALUE + b : a > Integer.MAX_VALUE + b ) {
    throw new ArithmeticException("Not in range");
  }
  return a - b;  // Value within range; can perform the addition
}