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:
64 # 5994 @ 8659 # 885

Ex Output:
1844


Ex Input:
9938 # 267 # 6696 # 8186 # 5729 # 8517 # 6331 @ 7607

Ex Output:
-18181


Ex Input:
8242 @ 7953 @ 3522 @ 3421 @ 4575 # 3685 # 2769

Ex Output:

21259