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:
1815 - 3167 - 773

Ex Output:
5755


Ex Input:
498 - 1972 - 9321 + 1234 - 3567 - 8069 + 5075

Ex Output:

17118