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:
178 + 5236 - 8372 - 6825 + 1044 - 7818 - 4765 + 7418

Ex Output:
14260


Ex Input:
1691 - 755 + 5734 - 4774 + 4915 - 7249 - 47

Ex Output:
3867


Ex Input:
6758 + 9368 - 5978

Ex Output:

3368