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:
4317 # 7384 # 3193 # 3098 @ 2863 @ 1149 @ 7824 # 4889

Ex Output:
-2411


Ex Input:
2065 @ 2103 @ 1800

Ex Output:
5968


Ex Input:
8703 # 3785 @ 9259 # 6222 # 889 # 3563 # 4661

Ex Output:

-1158