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:
2848 - 3478 + 9230 + 3585 + 8537 - 3821

Ex Output:
-11205


Ex Input:
9909 - 1362 + 9804 + 5190 + 8223 - 3758

Ex Output:
-8188


Ex Input:
7744 + 912 + 4366

Ex Output:

2466