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:
3462 @ 9743 @ 8298

Ex Output:
21503


Ex Input:
9682 @ 9507 # 7565 # 4252

Ex Output:
7372


Ex Input:
5569 # 5161 @ 9240 @ 391 @ 2756 # 7345 @ 4533

Ex Output:

9983