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:
7671 - 2300 - 9650 - 6692 + 7656 + 4940 - 2878 - 5602 + 7222

Ex Output:
14975


Ex Input:
9050 + 7188 + 3589 + 8762 + 268 + 1995 + 6080 - 4900

Ex Output:
-13932


Ex Input:
271 - 2680 + 4844 + 4249 + 9969 - 1825 - 9110 - 1392

Ex Output:

-3784