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:
3337 @ 9906 @ 9733 # 853 @ 5075 # 2064 @ 9450 # 3886

Ex Output:
30698


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

Ex Output:
-5204


Ex Input:
5250 @ 6747 @ 4215 @ 1495

Ex Output:

17707