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:
64 # 5994 @ 8659 # 885

Ex Output:
1844


Ex Input:
4391 @ 5714 # 6028 # 3645 @ 7510 # 827 @ 3865 # 5655 @ 3467

Ex Output:

8792