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: 8782 @ 1837 # 6954

Output: 3665


Input: Consider Input: 5631 # 7224 @ 9746 # 8532 @ 8996 # 3971 # 8538 @ 5270 # 9789

Output: -8411


Input: Consider Input: 5377 @ 1308 @ 6763 @ 544


Output: 13992