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:
290 @ 5200 # 3274 # 8548

Ex Output:
-6332


Ex Input:
6385 # 7829 @ 2463 @ 3411 # 652 # 5880 # 6454

Ex Output:
-8556


Ex Input:
9675 @ 654 # 3638 # 2409

Ex Output:

4282