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:
1837 @ 4842 # 1682 @ 5953

Ex Output:
10950


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

Ex Output:
4826


Ex Input:
8663 # 6096 @ 8482 @ 8508 # 9171 # 1160 @ 79

Ex Output:

9305