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: 8771 @ 2575 # 7914 # 3691
Example Output: -259

Example Input: 3164 # 160 @ 1567 # 8453 # 9293 @ 9371
Example Output: -3804

Example Input: 8294 @ 4035 # 7563 # 8979
Example Output:
-4213

