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:
9781 # 2797 # 2134

Ex Output:
4850


Ex Input:
6312 @ 1446 # 1616 @ 6758 # 9137 @ 6041

Ex Output:
9804


Ex Input:
1696 # 5675 # 8751 # 8108 @ 7456 # 406 @ 9666 @ 5066

Ex Output:

944