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:
9551 @ 4169 # 3026 @ 616 # 5398 # 6695 # 5831 # 898 # 1255

Ex Output:
-8767


Ex Input:
8161 @ 9287 # 6233

Ex Output:
11215


Ex Input:
4242 # 1088 # 4873 @ 766 @ 1641 @ 7003 @ 7327 @ 5270

Ex Output:

20288