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:
4326 # 2636 @ 9431 # 1021 # 6603 # 2905 # 80 # 7174 # 3558

Ex Output:
-10220


Ex Input:
7775 @ 8190 # 2579 @ 1003

Ex Output:
14389


Ex Input:
8256 @ 2279 @ 2504 @ 3849 # 6215 # 4069 # 5848 @ 376 # 7862

Ex Output:

-6730