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:
2177 - 4714 + 9417 - 376 - 2611 + 7130 - 2152

Ex Output:
-4517


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

Ex Output:
12041


Ex Input:
9735 - 5262 - 2030 + 8634

Ex Output:

8393