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:
2010 + 6744 - 5577 - 1182 + 8811

Ex Output:
-6786


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

Ex Output:
14737


Ex Input:
9198 - 5834 - 6945 + 7479

Ex Output:

14498