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:
4089 @ 276 @ 7408 # 9945 @ 4656

Ex Output:
6484


Ex Input:
6960 # 4418 @ 5450 @ 8475

Ex Output:
16467


Ex Input:
3764 # 1457 # 2430

Ex Output:

-123