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:
9074 # 3474 @ 2553 @ 8125 # 7981 # 1438 @ 9668

Ex Output:
16527


Ex Input:
4101 @ 2536 # 502

Ex Output:
6135


Ex Input:
471 # 9710 @ 8818 @ 2291 @ 2604

Ex Output:

4474