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:
1312 - 814 - 8592 - 4040 - 5158 + 6817

Ex Output:
13099


Ex Input:
9447 - 88 - 9606 - 2754

Ex Output:
21895


Ex Input:
3014 - 6627 + 1953 + 2475 + 6453 + 296 + 8680

Ex Output:

-10216