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:
4586 # 8527 @ 5828 @ 460 @ 1195

Ex Output:
3542


Ex Input:
7775 # 9805 # 8727

Ex Output:
-10757


Ex Input:
5514 @ 137 @ 3115 @ 3693

Ex Output:

12459