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:
3938 @ 6900 @ 1254 @ 25 # 7237 # 5576 @ 8865 # 8864 @ 1349

Ex Output:
654


Ex Input:
9540 # 9387 # 8692 @ 5008 # 4886 @ 9427 @ 3816

Ex Output:
4826


Ex Input:
252 # 1496 @ 925 @ 2316

Ex Output:

1997