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

Ex Output:
12041


Ex Input:
2349 - 9730 - 8231 + 6983 + 9097 + 6965 - 2760

Ex Output:
25


Ex Input:
4045 - 4346 + 9955 - 490 + 7380 - 5795 + 705

Ex Output:

-3364