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:
5253 @ 2450 @ 1316 @ 9889 @ 6449 @ 4948

Ex Output:
30305


Ex Input:
8050 # 8744 @ 5247 # 7761 # 8743

Ex Output:
-11951


Ex Input:
5264 # 6562 # 8884

Ex Output:

-10182