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:
9276 @ 7324 @ 3048 # 8186 # 4920 # 2964

Ex Output:
3578


Ex Input:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
9166 @ 9932 # 1924 @ 696

Ex Output:

17870