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:
9889 @ 8457 # 4692

Ex Output:
13654


Ex Input:
6322 # 7953 # 5 @ 7093 @ 5659 @ 5045 # 904

Ex Output:
15257


Ex Input:
5979 @ 5604 # 8187 # 8891 @ 3219 # 8843 @ 1398

Ex Output:

-9721