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:
5631 # 7224 @ 9746 # 8532 @ 8996 # 3971 # 8538 @ 5270 # 9789

Ex Output:
-8411


Ex Input:
4970 @ 8711 @ 6188

Ex Output:
19869


Ex Input:
4408 # 1522 @ 9657 @ 8595 @ 5125 # 9718 # 8403 # 7813

Ex Output:

329