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:
9012 @ 4688 # 2482 # 8827 # 2749 # 259 # 8385

Ex Output:
-9002


Ex Input:
815 @ 7862 # 6166

Ex Output:
2511


Ex Input:
1220 # 7008 # 4400

Ex Output:

-10188