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:
9487 # 9520 @ 4047

Ex Output:
4014


Ex Input:
958 # 263 # 1097 @ 3868 # 3982

Ex Output:
-516


Ex Input:
9781 # 2797 # 2134

Ex Output:

4850