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:
9566 # 6244 @ 3039 # 947 # 6321 @ 7732

Ex Output:
6825


Ex Input:
8238 @ 9817 # 2474 @ 3673 @ 9625 # 849 @ 1441

Ex Output:
29471


Ex Input:
8821 @ 7631 # 9509 # 7127

Ex Output:

-184