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:
4495 + 1180 - 7554 - 4842

Ex Output:
15711


Ex Input:
5292 + 3623 + 7450

Ex Output:
-5781


Ex Input:
6516 + 2967 - 2954 - 227 + 7442 - 3861 + 8498

Ex Output:

-5349