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:
9056 @ 9894 # 9773 # 4508 # 5642

Ex Output:
-973


Ex Input:
6960 # 4418 @ 5450 @ 8475

Ex Output:
16467


Ex Input:
5822 # 2510 # 6515 # 7070 @ 1890 # 9369 # 5945 @ 4888

Ex Output:

-18809