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:
1592 - 2894 - 9980 + 4503 - 4006 - 8338 - 6314 + 4860 + 6836

Ex Output:
16925


Ex Input:
519 - 9471 - 7173 - 34 - 5123 + 9104 - 2340 + 7208 - 3693

Ex Output:
12041


Ex Input:
1951 - 2346 - 4098 + 5835 + 7872 - 2947 + 2282 + 5307

Ex Output:

-9954