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:
1721 # 7193 # 7392 # 8999 # 7847 @ 5571 @ 4439 @ 7158 # 6030

Ex Output:
-18572


Ex Input:
5406 @ 9263 @ 7443 @ 6591 # 7496 @ 2721 # 7867

Ex Output:
16061


Ex Input:
1340 @ 4158 @ 5279

Ex Output:

10777