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:
8974 + 8978 - 8097

Ex Output:
8093


Ex Input:
368 + 9423 + 1106 + 2868

Ex Output:

-13029