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:
519 - 9471 - 7173 - 34 - 5123 + 9104 - 2340 + 7208 - 3693

Ex Output:
12041


Ex Input:
4287 + 3355 + 4251 + 7433 + 7069

Ex Output:
-17821


Ex Input:
1436 + 3822 - 3073

Ex Output:

687