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:
9835 @ 3285 # 8713 # 3066

Ex Output:
1341


Ex Input:
877 # 7761 # 7154 # 4993 # 2712

Ex Output:
-21743


Ex Input:
388 # 4244 @ 9022 @ 4394 # 2944 @ 3897 # 5935 @ 9010 # 2085

Ex Output:

11503