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:
6108 + 2133 + 8600

Ex Output:
-4625


Ex Input:
6368 + 9565 - 7042 - 1940 - 9960

Ex Output:
15745


Ex Input:
1196 + 1357 + 385

Ex Output:

-546