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:
1589 + 4479 - 6111 - 3158 - 7662

Ex Output:
14041


Ex Input:
7169 + 1918 - 7501 + 5160 + 9033 - 3341 + 4286

Ex Output:
-2386


Ex Input:
6792 - 8687 + 2530 - 4158 + 861 + 5459 + 5285 + 9097 - 2080

Ex Output:

-1515