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: 6284 + 1234 + 9639 + 1470 + 4137 + 9445 + 5309 + 9797 - 4507

Output: -30240


Input: Consider Input: 812 + 6106 - 2904 + 7738 + 7655 - 6987

Output: -10796


Input: Consider Input: 7199 - 6634 + 3327 - 2685 + 3412 + 5049


Output: 4730