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:
3522 @ 8651 @ 5172 # 4816 # 7424 # 1074 # 1822 # 1419

Ex Output:
790


Ex Input:
6844 @ 1340 # 4174 # 5664 @ 4911 # 5241

Ex Output:
-1984


Ex Input:
9581 # 5956 @ 5479 # 9298

Ex Output:

-194