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:
1062 @ 9466 @ 4653

Ex Output:
15181


Ex Input:
6904 # 1007 @ 9690 @ 9967 @ 9620 @ 4765

Ex Output:
39939


Ex Input:
5547 @ 5451 @ 3366 # 5768 # 6758 # 8514

Ex Output:

-6676