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:
5177 @ 9496 # 845 @ 5246 @ 9906 @ 5654 @ 1721 @ 5303

Ex Output:
41658


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

Ex Output:
39939


Ex Input:
862 @ 3833 # 3090 @ 4208 @ 602 # 3614 # 4137 # 7475 @ 1987

Ex Output:

-6824