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:
8739 - 8064 - 7000 + 6709

Ex Output:
17094


Ex Input:
5610 - 3034 + 9312 + 7337 + 2731 + 8581 + 5926 - 2102 + 2137

Ex Output:
-25278


Ex Input:
3069 + 3141 - 6765 + 85 - 9346 + 8391 + 121 + 7644

Ex Output:

-202