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:
6732 @ 5690 # 2448 @ 1752 @ 7805 # 1629 # 9280

Ex Output:
8622


Ex Input:
16 @ 4157 @ 3953 @ 8863

Ex Output:
16989


Ex Input:
7053 # 797 @ 1011 # 43 # 2798 # 1572 # 4498

Ex Output:

-1644