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:
8997 @ 8611 # 604 @ 1810 # 1906 @ 5956

Ex Output:
22864


Ex Input:
4397 # 3478 # 9837 # 7164 @ 7972 @ 3676

Ex Output:

-4434