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:
1837 - 6362 - 226

Ex Output:
8425


Ex Input:
2848 - 3478 + 9230 + 3585 + 8537 - 3821

Ex Output:
-11205


Ex Input:
1381 + 5588 + 6620 + 1773

Ex Output:

-12600