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:
7376 @ 9212 @ 1713 # 9993

Ex Output:
8308


Ex Input:
1516 # 4681 # 225 # 3393 @ 1212 @ 367

Ex Output:
-5204


Ex Input:
3641 # 650 @ 4731 # 1519 # 9363

Ex Output:

-3160