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:
4193 @ 3477 # 3125 @ 6912 @ 2615 @ 9846 @ 9806 # 4965

Ex Output:
28759


Ex Input:
992 # 6304 @ 9489 # 6814 # 5448 @ 4565

Ex Output:
-3520


Ex Input:
5135 @ 9254 @ 7170 # 9463 # 2302 # 48 # 466 @ 2215 # 7659

Ex Output:

3836