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:
2537 - 3199 + 5925 + 8172 + 3564 + 8810

Ex Output:
-20735


Ex Input:
3428 - 8444 - 2270 - 3241 - 1368 - 8884 - 6840 - 5265

Ex Output:
39740


Ex Input:
772 + 9599 - 4170

Ex Output:

-4657