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:
3438 - 3865 - 956 - 3020 + 2696

Ex Output:
8583


Ex Input:
8155 + 6800 - 6839 - 8047 + 3270

Ex Output:
12971


Ex Input:
3060 - 5310 - 2484 - 2970 + 2028 + 1985 + 1926

Ex Output:

7885