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:
8243 + 5509 - 2652 - 916 - 1636 + 9824

Ex Output:
-1886


Ex Input:
4899 + 5775 - 8386 + 4273

Ex Output:
3237


Ex Input:
7101 + 8608 + 4637

Ex Output:

-6144