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:
4733 + 1935 - 5989 + 2634 - 6798 + 9853 + 9265 - 14 - 4165

Ex Output:
-1988


Ex Input:
556 + 5223 - 5888 + 4866

Ex Output:
-3645


Ex Input:
1148 + 8629 + 5443 - 5471

Ex Output:

-7453