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:
808 - 4935 + 288 + 9758 + 8690 + 384 + 4674 + 5769 - 8736

Ex Output:
-15084


Ex Input:
6439 - 6685 + 6156 - 3314 + 6845 - 6872

Ex Output:
10309


Ex Input:
705 - 4393 + 5594 - 9432 - 5341 - 3543 + 5093 - 1505 + 7707

Ex Output:

6525