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:
8045 @ 7755 # 7077 # 209 @ 8324 @ 9768 # 6169 @ 4387

Ex Output:
24824


Ex Input:
7982 # 9393 @ 981 @ 2884 # 1556 @ 752 # 322 # 3235

Ex Output:
-1907


Ex Input:
7029 # 7244 @ 4716 @ 1269

Ex Output:

5770