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:
8354 + 2602 + 1315

Ex Output:
4437


Ex Input:
4274 - 4385 - 2316 - 7783

Ex Output:
18758


Ex Input:
1235 + 3357 - 8022 + 4299 + 5006 + 9911 - 3723 - 1832

Ex Output:

-7761