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:
8053 # 8275 @ 3672 # 7233 @ 8748 # 1270 # 6997 # 7566 @ 5689

Ex Output:
-5179


Ex Input:
7579 @ 2801 # 7154 @ 4185 # 825 @ 4256 @ 9614

Ex Output:
20456


Ex Input:
5414 @ 4107 @ 8015 @ 7231

Ex Output:

24767