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:
1678 - 831 + 1988 - 3248 - 7672 + 8515 + 5236 - 2764 - 6078

Ex Output:
6532


Ex Input:
1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023

Ex Output:
18543


Ex Input:
9874 + 4134 + 322 + 7501 - 4070 + 2217 - 432 + 962

Ex Output:

-760