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 + 6734 + 3016 + 637 - 2671 - 5486 - 1133 + 1713 - 2180

Ex Output:
5478


Ex Input:
1808 - 5352 - 8697 + 5058 + 8777 + 8089 - 9688 + 9784

Ex Output:
-6163


Ex Input:
1198 + 3839 + 8374

Ex Output:

-11015