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:
7936 @ 9333 @ 6122 @ 6291 # 210

Ex Output:
29472


Ex Input:
7376 @ 9212 @ 1713 # 9993

Ex Output:
8308


Ex Input:
2415 @ 4087 # 8960

Ex Output:

-2458