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:
8885 - 9148 - 6665 - 7609 + 4183 + 3591 + 5158 - 5649 + 9511

Ex Output:
15513


Ex Input:
3238 + 2914 + 4122

Ex Output:
-3798


Ex Input:
8497 + 9683 - 1832 - 8450 + 8650 - 640 + 5090 + 8381

Ex Output:

-12385