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:
610 # 7967 # 8700 # 5966 @ 4310 @ 9963 # 8525

Ex Output:
-16275


Ex Input:
5460 # 8572 @ 5548

Ex Output:
2436


Ex Input:
3329 @ 9486 # 640 @ 9318 @ 907 @ 6264 # 7149

Ex Output:

21515