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:
9118 + 5545 - 3160 + 3672 - 3568 + 5997 + 205 + 7095

Ex Output:
-6668


Ex Input:
8838 + 1241 - 4918 - 8353 - 4691 - 5880

Ex Output:
31439


Ex Input:
4694 + 7831 + 6494 + 9342

Ex Output:

-18973