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:
938 + 566 + 5270 + 5634 - 7451 - 114

Ex Output:
-2967


Ex Input:
395 - 3060 - 445 + 3450 + 3365

Ex Output:
-2915


Ex Input:
8618 - 5627 + 6511 - 6799

Ex Output:

14533