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:
8678 @ 7424 # 7399 @ 4601 @ 9327 @ 7787 @ 2286

Ex Output:
32704


Ex Input:
1162 @ 622 # 7209 @ 3448

Ex Output:
-1977


Ex Input:
4149 @ 8710 @ 2521 @ 4254

Ex Output:

19634