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:
4532 @ 5773 @ 2346 @ 6961 # 8280

Ex Output:
11332


Ex Input:
1837 @ 4842 # 1682 @ 5953

Ex Output:
10950


Ex Input:
7618 @ 1641 @ 2217 # 8853 # 7501 @ 1888

Ex Output:

-2990