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:
8732 # 4760 @ 9372

Ex Output:
13344


Ex Input:
5425 @ 6980 # 4301 @ 4410 # 7405 # 552 @ 4556 # 8531 # 4935

Ex Output:
-4353


Ex Input:
3147 @ 2272 # 9050

Ex Output:

-3631