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

Example Input: 7640 @ 3347 @ 904
Example Output: 11891

Example Input: 8324 # 6868 # 6537
Example Output: -5081

Example Input: 8364 @ 6846 # 7929 @ 1758 # 8874 @ 390 @ 4422 # 4381 # 6184
Example Output:
-5588