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:
580 @ 9980 # 4059 # 4694 @ 8096 # 3324

Ex Output:
6579


Ex Input:
8524 # 5976 # 1534 @ 266 # 6452 @ 3945 # 2305

Ex Output:
-3532


Ex Input:
2914 # 3326 # 8666 # 2541 @ 2956 # 9579

Ex Output:

-18242