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:
877 # 7761 # 7154 # 4993 # 2712

Ex Output:
-21743


Ex Input:
6348 # 2614 @ 3559 @ 9670 # 1137 # 9684

Ex Output:
6142


Ex Input:
6050 # 5266 # 3005

Ex Output:

-2221