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: 4449 @ 4019 @ 7637
Example Output: 16105

Example Input: 872 @ 547 # 4476 @ 6631 # 8433 # 452 @ 5115
Example Output: -196

Example Input: 5441 @ 5942 # 6265 @ 7909 # 7647 # 3082 @ 2860
Example Output:
5158