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:
4397 - 3478 - 9837 - 7164 + 7972 + 3676

Ex Output:
13228


Ex Input:
5630 - 3377 + 9205 - 4071 + 9580 - 7049

Ex Output:
1342


Ex Input:
5773 - 2989 + 8993 + 6702 + 2237 - 1402 - 4236 - 1857

Ex Output:

-1675