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:
463 @ 7844 # 9816

Ex Output:
-1509


Ex Input:
8760 @ 4583 # 2942 # 3854 # 5061 @ 31 # 5965

Ex Output:
-4448


Ex Input:
4249 # 9021 # 6894

Ex Output:

-11666


