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:
4324 # 426 # 9171 # 980 @ 9454 @ 9720 # 7367 # 9266 # 1237

Ex Output:
-4949


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

Ex Output:
15520


Ex Input:
3093 # 9410 @ 3927 # 4299 # 834

Ex Output:

-7523