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:
4264 - 4438 + 3871 + 7585 - 540 - 3455 - 6016

Ex Output:
7257


Ex Input:
1471 + 6113 + 3177 - 2507 - 2358 + 6654

Ex Output:
-9608


Ex Input:
2400 + 4080 + 5471 + 7562 + 3963

Ex Output:

-18676