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:
1948 @ 7201 @ 611 # 9763 # 2998 # 5097 # 9302 # 3012 # 8272

Ex Output:
-28684


Ex Input:
8717 @ 6135 # 2706

Ex Output:
12146


Ex Input:
4122 @ 2573 # 3503 # 2655 @ 1062 # 5817 # 5172 # 1485

Ex Output:

-10875