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: 4449 @ 4019 @ 7637

Output: 16105


Input: Consider Input: 3363 @ 4009 @ 5612 # 7774 @ 1547 @ 531 @ 9025 @ 3155 # 3948

Output: 15520


Input: Consider Input: 1667 # 2683 @ 8202 @ 3726


Output: 10912