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:
2763 @ 869 # 8299

Ex Output:
-4667


Ex Input:
2020 @ 862 # 5780

Ex Output:
-2898


Ex Input:
8625 # 9443 # 3242 @ 6950 # 7273 @ 3434 # 1602 @ 1710 # 7317

Ex Output:

-8158