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:
8422 @ 5670 # 5825 @ 3613

Ex Output:
11880


Ex Input:
1482 # 6461 @ 804 # 8626 # 8564

Ex Output:
-21365


Ex Input:
1779 @ 2897 # 3196 @ 4846

Ex Output:

6326