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.

Ex Input:
8929 - 6145 + 8551 - 1836 + 9159

Ex Output:
-800


Ex Input:
5342 - 6456 - 9929 + 3119 - 1242 + 314

Ex Output:
19536


Ex Input:
7643 + 559 + 1606 - 4662 - 418 + 9237 - 6482 - 5834

Ex Output:

13637