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:
8571 # 5985 @ 8912

Ex Output:
11498


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

Ex Output:
41658


Ex Input:
8252 @ 2175 @ 7005 @ 3549 # 5141 # 2909 # 6751

Ex Output:

6180