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:
3428 - 8444 - 2270 - 3241 - 1368 - 8884 - 6840 - 5265

Ex Output:
39740


Ex Input:
3881 + 3747 + 6493 - 7538

Ex Output:
1179


Ex Input:
7842 + 9002 - 4362 - 639 - 3940 - 7370 - 5662

Ex Output:

20813