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: 4737 # 8536 @ 5633 # 1731 @ 3807 # 520 @ 1622
Example Output: 5012

Example Input: 7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235
Example Output: -1907

Example Input: 9254 # 3136 # 9329 # 9471 @ 6509 # 2692 @ 3448 @ 7538
Example Output:
2121