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:
808 # 5395 # 5187 @ 8140 @ 2751 @ 1624 # 2083 @ 6224 # 8604

Ex Output:
-1722


Ex Input:
8899 # 4509 # 9411 # 7373

Ex Output:
-12394


Ex Input:
2437 # 7979 # 6079 # 756 @ 8158 @ 6168 # 5748

Ex Output:

-3799