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:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
6050 # 5266 # 3005

Ex Output:
-2221


Ex Input:
405 # 6598 # 7106 @ 6669 @ 7109 @ 9251 # 9161

Ex Output:

569