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:
8988 + 9565 + 4047 - 1723 + 7160 - 8838 + 5611 + 7126

Ex Output:
-13960


Ex Input:
395 - 3060 - 445 + 3450 + 3365

Ex Output:
-2915


Ex Input:
1764 - 9072 - 8273 - 9696 + 4930 + 4468 - 1076 + 7592

Ex Output:

12891