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:
1365 # 3902 @ 5909

Ex Output:
3372


Ex Input:
519 @ 5751 @ 8900 @ 3476 # 8727 # 9607 # 350 @ 8481

Ex Output:
8443


Ex Input:
1691 # 755 @ 5734 # 4774 @ 4915 # 7249 # 47

Ex Output:

-485