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: 6729 # 1204 # 5514 # 8079

Output: -8068


Input: Consider Input: 8324 # 6868 # 6537

Output: -5081


Input: Consider Input: 6609 # 3774 # 3724


Output: -889