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:
7065 # 7713 # 7473 # 664 # 8030

Ex Output:
-16815


Ex Input:
2497 # 4988 @ 8200 # 3896 @ 5601 @ 1004

Ex Output:
8418


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

Ex Output:

-4710