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:
6844 - 1807 - 1809 + 4406 - 1450 - 5252 + 2685

Ex Output:
10071


Ex Input:
2977 - 4470 - 76 + 164 + 8433 - 2054 - 4953

Ex Output:
5933


Ex Input:
9180 + 1790 + 9532

Ex Output:

-2142