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:
3894 # 3818 # 2119 # 6333

Ex Output:
-8376


Ex Input:
4089 @ 276 @ 7408 # 9945 @ 4656

Ex Output:
6484


Ex Input:
5338 # 4955 @ 2398 # 4176 @ 749 # 3187 # 3053

Ex Output:

-6886