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:
5137 @ 4207 @ 1156

Ex Output:
10500


Ex Input:
5864 @ 1124 @ 8693 @ 9334 # 3186 @ 9297 @ 9008

Ex Output:

40134