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:
5631 # 7224 @ 9746 # 8532 @ 8996 # 3971 # 8538 @ 5270 # 9789

Ex Output:
-8411


Ex Input:
8780 # 5826 # 420 @ 8814 @ 5786 # 1725

Ex Output:
15409


Ex Input:
7015 # 8445 @ 8311 # 1390 @ 3793 # 2811 # 3189

Ex Output:

3284