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:
2178 - 6447 + 5843 + 9653 + 4633 - 5887 + 8815 - 6635 + 178

Ex Output:
-7975


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

Ex Output:
1313


Ex Input:
6346 + 1744 + 9870

Ex Output:

-5268