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:
775 - 7609 + 2326 + 8760 + 4505

Ex Output:
-7207


Ex Input:
6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Ex Output:
-14639


Ex Input:
8351 - 4913 + 5669 - 3835 + 6606 + 6669 - 29

Ex Output:

-1816