In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Input: Consider Input: 6789 - 6255 + 3477 - 8628 + 3410 + 5875 + 7308 + 2357

Output: -755


Input: Consider Input: 5450 - 7077 + 4877

Output: 7650


Input: Consider Input: 8678 - 7756 - 2719


Output: 19153