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:
958 # 263 # 1097 @ 3868 # 3982

Ex Output:
-516


Ex Input:
3407 @ 917 # 567 @ 5987 # 5936

Ex Output:
3808


Ex Input:
4103 # 9737 @ 6805 @ 6077 # 9731 @ 7434 # 7886

Ex Output:

-2935