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:
9285 # 5492 @ 6629 # 5477 @ 5969 # 8754

Ex Output:
2160


Ex Input:
7640 @ 3347 @ 904

Ex Output:
11891


Ex Input:
1591 # 4096 @ 4335 # 8517 # 4712 # 2941 @ 2489 @ 3703

Ex Output:

-8148