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:
321 - 4450 - 5504 - 9901 - 295 - 7018 - 1113 - 5299 - 2387

Ex Output:
36288


Ex Input:
9689 - 3967 - 2592 - 3020 - 6589

Ex Output:
25857


Ex Input:
3692 + 5353 - 6569 - 7588 - 6613 - 5036 + 8267 - 3445

Ex Output:

19323