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

Ex Input:
6960 # 4418 @ 5450 @ 8475

Ex Output:
16467


Ex Input:
8158 @ 1325 @ 395 # 4068 @ 4226 @ 7713 @ 8368 # 3297

Ex Output:
22820


Ex Input:
9242 # 8638 @ 7422 @ 6513

Ex Output:

14539