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:
7163 + 3916 + 4926 + 2532 - 2743 - 5389 + 7290

Ex Output:
-3369


Ex Input:
8737 - 2978 - 6717

Ex Output:
18432


Ex Input:
5331 - 1694 + 8913 - 9407 - 5544 + 4502 - 3967 - 8557

Ex Output:

21085