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:
5986 # 3224 # 3957 @ 1893 @ 9453 @ 3954 # 476 # 5750 # 5163

Ex Output:
2716


Ex Input:
5245 # 2258 @ 1333 # 9626 @ 7040 @ 9804

Ex Output:
11538


Ex Input:
7074 # 3681 @ 1097

Ex Output:

4490