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:
7769 @ 9568 @ 388 # 5101 # 8590 # 9063 # 5298 @ 7728

Ex Output:
-2599


Ex Input:
9879 # 8585 @ 4078 # 6210 @ 7239 @ 3002 # 2455 @ 9817

Ex Output:
16765


Ex Input:
8285 # 2639 @ 7666 # 6275 @ 7356

Ex Output:

14393