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:
3140 - 7915 + 2559 - 9684 + 4182 - 683 + 7754 + 763 + 4851

Ex Output:
1313


Ex Input:
8301 - 6117 + 9106 + 2168 - 4036 - 2644 + 8999

Ex Output:
825


Ex Input:
5755 - 5367 + 3190 - 4320 - 5398 + 8389 + 8899 - 9300

Ex Output:

9662