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:
1721 # 7193 # 7392 # 8999 # 7847 @ 5571 @ 4439 @ 7158 # 6030

Ex Output:
-18572


Ex Input:
5245 # 2258 @ 1333 # 9626 @ 7040 @ 9804

Ex Output:
11538


Ex Input:
2853 @ 2447 @ 3565

Ex Output:

8865