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: 427 # 7974 # 7564 @ 2404 # 4955 # 1239 # 1518 @ 906

Output: -19513


Input: Consider Input: 1446 @ 5354 # 6450 # 2821 @ 2258

Output: -213


Input: Consider Input: 485 @ 3169 # 6408 # 5976


Output: -8730


