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:
1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023

Ex Output:
18543


Ex Input:
9852 - 24 - 2468 + 5798 + 6384

Ex Output:
162


Ex Input:
8157 - 5757 + 3186 - 7207 - 1112 + 1146 + 2718

Ex Output:

15183