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:
5162 - 4324 - 8160 + 9296 - 1881

Ex Output:
10231


Ex Input:
7165 + 3630 + 9021 - 4140 + 319

Ex Output:
-1665


Ex Input:
3018 - 2824 + 5821

Ex Output:

21