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:
7806 # 6020 # 4616 @ 3594 # 6312 # 5362 # 4403 @ 3666

Ex Output:
-11647


Ex Input:
5604 # 514 # 150 @ 4349 @ 958 # 6247 # 8710

Ex Output:
-4710


Ex Input:
3638 @ 8795 # 6674

Ex Output:

5759