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:
4130 @ 6495 # 3973

Ex Output:
6652


Ex Input:
1122 @ 3359 @ 4856 # 8802 @ 600 @ 3512 # 4067 @ 6320 @ 711

Ex Output:
7611


Ex Input:
3343 @ 578 # 7318 # 9596

Ex Output:

-12993