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:
486 # 3873 # 1187

Ex Output:
-4574


Ex Input:
5837 # 1015 # 4725

Ex Output:
97


Ex Input:
6193 @ 7675 @ 5906 # 8955 # 1107 @ 8851

Ex Output:

18563