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:
9954 @ 4250 # 4835 @ 6737 # 8434 # 6461 @ 1008

Ex Output:
2219


Ex Input:
4101 @ 5888 # 877 # 7900 # 6062 @ 6246

Ex Output:
1396


Ex Input:
3062 @ 9568 # 9357 @ 4733 # 4903 # 934 # 783 @ 6983

Ex Output:

8369