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: 2989 # 6833 # 4298 @ 8863 # 8408
Example Output: -7687

Example Input: 4558 @ 6469 @ 1154
Example Output: 12181

Example Input: 242 @ 2600 @ 7831
Example Output:
10673