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:
2671 + 3943 - 5777 + 7680

Ex Output:
-3175


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

Ex Output:
-13960


Ex Input:
3078 - 1433 + 9775 - 1781 + 5531

Ex Output:

-9014