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:
1221 @ 4619 # 3319 @ 2958

Ex Output:
5479


Ex Input:
3363 @ 4009 @ 5612 # 7774 @ 1547 @ 531 @ 9025 @ 3155 # 3948

Ex Output:
15520


Ex Input:
3928 @ 5550 # 3012 # 8200 # 8270

Ex Output:

-10004