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:
4647 - 2106 + 6760 + 3296 - 9772

Ex Output:
6469


Ex Input:
7815 - 856 + 9679 + 2512 - 7636 - 35 + 338 - 7312 + 4799

Ex Output:

6326