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:
4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170

Ex Output:
2069


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

Ex Output:
3867


Ex Input:
5948 + 2582 - 38 - 8916 + 5426

Ex Output:

6894