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: 837 @ 118 @ 1503 # 3288 @ 6669 # 1394

Output: 4445


Input: Consider Input: 324 @ 3925 # 7501 @ 1520


Output: -1732