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:
155 + 7497 + 4675 - 2329 - 9080 - 5510 - 2336 + 8701

Ex Output:
-1463


Ex Input:
6738 - 471 + 8724

Ex Output:
-1515


Ex Input:
7889 + 8882 + 646 - 6589 + 9521 + 1904 - 4666 - 2376 + 3178

Ex Output:

-2611