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:
9039 @ 4996 @ 845 # 5409

Ex Output:
9471


Ex Input:
9806 @ 7051 @ 6703 @ 4233 # 276

Ex Output:
27517


Ex Input:
8089 # 5648 # 2370 @ 9011 @ 9882 @ 3962 # 5157 @ 8630 # 1971

Ex Output:

24428