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:
540 @ 8823 @ 1244 # 1696 # 889 # 6035 # 5113 @ 2513

Ex Output:
-613


Ex Input:
1718 # 8860 # 9652

Ex Output:
-16794


Ex Input:
783 # 5009 @ 9408 @ 9792 # 7027 # 2708 # 7757 # 8544

Ex Output:

-11062