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:
4274 - 4385 - 2316 - 7783

Ex Output:
18758


Ex Input:
6163 + 7356 + 5264 - 4766 + 9373 + 1271

Ex Output:
-12335


Ex Input:
4882 - 7976 + 1156 - 2832 + 4656 - 6470 - 6478 + 5221 + 251

Ex Output:

17354