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:
4400 @ 9261 @ 3016

Ex Output:
16677


Ex Input:
6039 @ 1273 # 2162 # 5061 @ 5087 @ 4703

Ex Output:
9879


Ex Input:
8077 @ 4215 @ 1680 @ 3432 # 4220 @ 942 # 5512 @ 5919

Ex Output:

14533