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:
4189 # 3579 @ 7275 # 5186 @ 5825 # 3209

Ex Output:
5315


Ex Input:
8717 @ 6135 # 2706

Ex Output:
12146


Ex Input:
7934 # 3693 # 2847 @ 4087 # 3672 # 6127 # 7222

Ex Output:

-11540