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:
6439 - 6685 + 6156 - 3314 + 6845 - 6872

Ex Output:
10309


Ex Input:
2860 - 9056 - 3431 - 439 - 3169 - 5875

Ex Output:

24830