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

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

Output: 4826


Input: Consider Input: 3556 # 1722 @ 9362 # 7616 # 7893

Output: -4313


Input: Consider Input: 3407 @ 917 # 567 @ 5987 # 5936


Output: 3808