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:
1344 + 7632 - 4322

Ex Output:
-1966


Ex Input:
9485 + 6349 - 1527 - 4730 - 5865 + 851 - 7415 - 3548 + 2868

Ex Output:
22502


Ex Input:
6531 + 4348 + 3576 - 113 - 1553 + 1210

Ex Output:

-937