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:
2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Ex Output:
14737


Ex Input:
1471 - 7798 + 6514 + 8053 + 9926

Ex Output:

-15224