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:
2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Ex Output:
14737


Ex Input:
8974 + 8978 - 8097

Ex Output:
8093


Ex Input:
7483 + 4061 + 195 - 1982 + 5673 - 6623 + 9661 + 7613

Ex Output:

-11115