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:
2821 @ 5327 # 3350 # 3607 @ 7010 @ 6824 # 9975 # 38

Ex Output:
5012


Ex Input:
2370 # 437 # 89 # 6625 # 2724 @ 1767 # 2848 @ 3753

Ex Output:
-4833


Ex Input:
897 # 9797 @ 9183 @ 4372 # 5073 @ 1886 @ 928 # 5980

Ex Output:

-3584