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:
4700 + 6640 + 3352 - 3114 - 7674 - 8204 + 8654 + 8091 - 2969

Ex Output:
-76


Ex Input:
9972 + 4485 + 2598 - 1648 - 1078 + 8278

Ex Output:

-2663