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:
8053 # 8275 @ 3672 # 7233 @ 8748 # 1270 # 6997 # 7566 @ 5689

Ex Output:
-5179


Ex Input:
4565 @ 7065 # 5397

Ex Output:
6233


Ex Input:
8354 @ 5278 @ 3085 # 9653 # 9537

Ex Output:

-2473