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:
64 # 5994 @ 8659 # 885

Ex Output:
1844


Ex Input:
4532 @ 5773 @ 2346 @ 6961 # 8280

Ex Output:
11332


Ex Input:
6271 # 3952 @ 476

Ex Output:

2795