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:
4317 # 7384 # 3193 # 3098 @ 2863 @ 1149 @ 7824 # 4889

Ex Output:
-2411


Ex Input:
5860 @ 3039 # 7874 # 3584 # 144

Ex Output:
-2703


Ex Input:
6645 @ 1416 @ 2174 # 120 # 5847 @ 2506 @ 4548 @ 2837 # 3812

Ex Output:

10347