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:
4264 # 4438 @ 3871 @ 7585 # 540 # 3455 # 6016

Ex Output:
1271


Ex Input:
185 @ 9038 # 2832

Ex Output:

6391