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:
5088 - 9353 - 2772 + 3908 + 9196 + 4709

Ex Output:
-600


Ex Input:
4595 - 7078 - 3675 - 7559

Ex Output:

22907