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:
6881 + 1331 - 470 + 6067 - 9323

Ex Output:
9276


Ex Input:
4486 + 7884 - 172 + 2615

Ex Output:
-5841


Ex Input:
4396 + 4108 - 964 - 5997 - 468 - 2463 + 6103 - 5366 - 6369

Ex Output:

15812