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:
1616 - 440 + 11

Ex Output:
2045


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

Ex Output:
22502


Ex Input:
4522 + 7785 + 1125 - 5751 + 9593 - 1081 + 2429

Ex Output:

-9578