In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Ex Input:
298 @ 1699 @ 1367 @ 5001

Ex Output:
8365


Ex Input:
8782 @ 1837 # 6954

Ex Output:
3665


Ex Input:
8237 @ 4421 # 6684

Ex Output:

5974


