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:
2475 # 126 @ 138 # 2303 # 5327 # 6412 # 9849 # 8474 # 6460

Ex Output:
-36338


Ex Input:
9741 # 8583 @ 2183 # 5623 @ 4144 # 4064 @ 3416 @ 9350 @ 4931

Ex Output:
15495


Ex Input:
4515 # 2156 # 8427 # 2175

Ex Output:

-8243