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: 3164 # 160 @ 1567 # 8453 # 9293 @ 9371

Output: -3804


Input: Consider Input: 2853 @ 2447 @ 3565

Output: 8865


Input: Consider Input: 9806 @ 7051 @ 6703 @ 4233 # 276


Output: 27517