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:
992 # 6304 @ 9489 # 6814 # 5448 @ 4565

Ex Output:
-3520


Ex Input:
146 # 5209 @ 892

Ex Output:

-4171


