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:
4970 @ 8711 @ 6188

Ex Output:
19869


Ex Input:
5571 @ 5729 # 6405 # 526 # 1330

Ex Output:
3039


Ex Input:
2482 @ 4030 # 4666 @ 5434 @ 8830 # 1801

Ex Output:

14309