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:
3876 @ 6607 # 1034 # 2483 @ 544 # 1053 @ 4907 @ 1303 @ 3904

Ex Output:
16571


Ex Input:
9504 # 5838 @ 6008 @ 5759 @ 2689

Ex Output:
18122


Ex Input:
694 @ 4432 # 9053

Ex Output:

-3927