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:
4956 # 4259 # 3459

Ex Output:
-2762


Ex Input:
6039 @ 1273 # 2162 # 5061 @ 5087 @ 4703

Ex Output:
9879


Ex Input:
7467 @ 5313 @ 6283 # 3478

Ex Output:

15585