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:
6355 - 3589 + 7310 - 5161 + 9803

Ex Output:
-2008


Ex Input:
2036 + 7313 - 8908 - 1870 - 5159 + 5945 + 5006 + 635 + 5551

Ex Output:
-6477


Ex Input:
9254 - 3136 - 9329 - 9471 + 6509 - 2692 + 3448 + 7538

Ex Output:

16387