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:
4110 - 9440 + 557 + 7868 - 6315 + 2518 - 9049 + 3905 + 2052

Ex Output:
12014


Ex Input:
3097 + 17 - 8842 + 4949 + 8377 + 425 - 7128 + 6500

Ex Output:
-1201


Ex Input:
9578 + 5703 + 686 - 400 - 5356

Ex Output:

8945