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:
8842 @ 3530 @ 7537

Ex Output:
19909


Ex Input:
610 # 7967 # 8700 # 5966 @ 4310 @ 9963 # 8525

Ex Output:
-16275


Ex Input:
1558 @ 9487 @ 6303 # 8467 @ 26 # 5293 # 1867 @ 6552

Ex Output:

8299