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:
2776 - 8931 + 2788 + 8315 - 6570 + 8385 - 2789

Ex Output:
1578


Ex Input:
9488 + 7771 + 5889 + 9584 + 3302 - 1602 + 5806 - 8895 - 8030

Ex Output:
-4337


Ex Input:
605 + 9301 + 640 - 9148 - 8015

Ex Output:

7827