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:
5371 + 2365 + 9586 - 6312 - 8369 - 7840 - 1823

Ex Output:
17764


Ex Input:
981 + 3338 + 96 + 3479 + 574 + 2567 + 3009 + 2356 - 4663

Ex Output:
-9775


Ex Input:
6894 - 2834 + 9131

Ex Output:

597