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:
5292 + 3623 + 7450

Ex Output:
-5781


Ex Input:
5342 - 6456 - 9929 + 3119 - 1242 + 314

Ex Output:
19536


Ex Input:
3313 + 7155 - 2857 + 9502 - 8371 + 9813

Ex Output:

-11929