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:
7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Ex Output:
21781


Ex Input:
4117 - 3380 - 4784

Ex Output:
12281


Ex Input:
2805 + 194 + 6364 - 8962 + 3668 + 1570 + 7379 + 8123

Ex Output:

-15531