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:
4325 + 2332 + 1470 - 1881 + 9204 - 2529 - 5460 + 5554

Ex Output:
-4365


Ex Input:
7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572

Ex Output:
-2011


Ex Input:
2195 - 5721 + 9237 - 2938 + 3319 - 4495

Ex Output:

2793