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:
9549 @ 21 # 6714 # 2406 # 2527 # 8527 @ 1769

Ex Output:
-8835


Ex Input:
1131 @ 2823 # 1847 @ 6137 @ 7300 @ 27

Ex Output:
15571


Ex Input:
6829 # 5002 # 5092 # 5590 # 9747 @ 2480 # 4010

Ex Output:

-20132