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:
9824 + 9255 - 8146 - 8393 - 6949 - 3238 + 2641 - 4068 + 4633

Ex Output:
24089


Ex Input:
2432 + 588 - 6240 + 8670

Ex Output:
-586


Ex Input:
2021 + 2958 + 2711 + 5662 + 8302 - 3643 - 4749

Ex Output:

-9220