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:
473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021

Ex Output:
-5534


Ex Input:
2977 - 4470 - 76 + 164 + 8433 - 2054 - 4953

Ex Output:
5933


Ex Input:
5052 - 6923 + 1011

Ex Output:

10964