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:
1861 - 3929 + 4952 - 8280

Ex Output:
9118


Ex Input:
3561 + 2090 - 1286 - 2259 - 7069 + 5058

Ex Output:
7027


Ex Input:
7760 - 414 + 9609 + 6903

Ex Output:

-8338