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:
9549 @ 21 # 6714 # 2406 # 2527 # 8527 @ 1769

Ex Output:
-8835


Ex Input:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
9884 @ 3516 # 611 # 1425 @ 2351

Ex Output:

13715