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:
9806 + 7051 + 6703 + 4233 - 276

Ex Output:
-7905


Ex Input:
8403 + 1868 + 5827 + 5471 - 3746 + 1027 - 5777

Ex Output:
3733


Ex Input:
6798 + 1557 - 7800 + 7871 - 9697 - 6344 - 779

Ex Output:

21990