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:
815 @ 7862 # 6166

Ex Output:
2511


Ex Input:
4616 @ 2249 # 272 @ 618 # 4242 @ 6599 @ 8683 @ 1628 # 7090

Ex Output:
12789


Ex Input:
7420 @ 6019 # 2881 @ 7781

Ex Output:

18339