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:
7053 - 797 + 1011 - 43 - 2798 - 1572 - 4498

Ex Output:
15750


Ex Input:
2671 + 3943 - 5777 + 7680

Ex Output:
-3175


Ex Input:
2005 + 8406 - 8464 + 2432 + 3536 - 999

Ex Output:

-2906