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: 2989 # 6833 # 4298 @ 8863 # 8408

Output: -7687


Input: Consider Input: 8524 # 5976 # 1534 @ 266 # 6452 @ 3945 # 2305

Output: -3532


Input: Consider Input: 8958 # 5590 @ 3918


Output: 7286


