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:
2416 @ 4557 @ 9089 @ 8858

Ex Output:
24920


Ex Input:
9746 # 6804 @ 5800 @ 8118 @ 2515 @ 1083 # 8754

Ex Output:
11704


Ex Input:
9551 @ 5659 @ 8454

Ex Output:

23664