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:
4586 # 8527 @ 5828 @ 460 @ 1195

Ex Output:
3542


Ex Input:
5052 # 6923 @ 1011

Ex Output:
-860


Ex Input:
5607 # 7622 # 848

Ex Output:

-2863