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:
8025 - 6991 - 3299 + 9670 - 3471

Ex Output:
12116


Ex Input:
5371 + 2365 + 9586 - 6312 - 8369 - 7840 - 1823

Ex Output:
17764


Ex Input:
4666 - 2444 + 974 - 4353 - 6355

Ex Output:

16844