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:
7149 - 7250 - 2026 - 4929 - 5525 + 1967 + 895 + 4245 - 720

Ex Output:
20492


Ex Input:
6355 - 3589 + 7310 - 5161 + 9803

Ex Output:
-2008


Ex Input:
441 - 5641 + 7628 + 5153 + 5348 + 1202 - 4991 - 6015 + 4120

Ex Output:

-6363