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:
2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Ex Output:
14737


Ex Input:
8294 + 6661 + 4555 + 6171

Ex Output:
-9093


Ex Input:
8000 + 2132 - 5708 - 6882 - 903 + 3275

Ex Output:

16086