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:
8671 + 9945 - 8465 - 5276 + 1447

Ex Output:
11020


Ex Input:
6763 - 8006 - 6381 - 8852 + 6218 + 3788 + 7296

Ex Output:
12700


Ex Input:
9301 + 2108 - 3572 - 8258 - 9801 + 9345

Ex Output:

19479