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:
3147 @ 2272 # 9050

Ex Output:
-3631


Ex Input:
8625 @ 3267 # 2323 # 3569

Ex Output:
6000


Ex Input:
2357 @ 1249 # 6447

Ex Output:

-2841


