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:
1380 @ 6582 # 4036

Ex Output:
3926


Ex Input:
931 # 5023 @ 6056 # 4419 # 1833 @ 5052 @ 1632 # 2282 @ 9337

Ex Output:
9451


Ex Input:
6662 # 4567 # 3376 @ 7409 @ 4839 # 4220 # 729 @ 7817

Ex Output:

13835