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:
9546 @ 5515 @ 6740 # 2069 # 921 # 9110 # 5067 # 3917 # 6434

Ex Output:
-5717


Ex Input:
8782 @ 1837 # 6954

Ex Output:
3665


Ex Input:
2031 @ 8859 # 7119 # 8835 @ 7359

Ex Output:

2295