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:
345 @ 1076 @ 7948 # 854

Ex Output:
8515


Ex Input:
5235 @ 3917 @ 4902 @ 3831 # 6517

Ex Output:
11368


Ex Input:
4180 # 3276 # 1575 @ 9963 @ 3933 # 5330 @ 1193 @ 8637

Ex Output:

17725