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:
1294 # 4752 # 8113 @ 9201 @ 8582 # 7189 @ 2849

Ex Output:
1872


Ex Input:
826 # 6501 # 223 @ 9761 # 8863

Ex Output:
-5000


Ex Input:
8088 @ 6820 @ 2966 @ 6181 # 2085

Ex Output:

21970