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:
4089 @ 276 @ 7408 # 9945 @ 4656

Ex Output:
6484


Ex Input:
9504 # 5838 @ 6008 @ 5759 @ 2689

Ex Output:
18122


Ex Input:
3761 @ 8923 @ 950 # 6805 @ 2086 # 7222 # 6599

Ex Output:

-4906