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:
5640 @ 148 @ 7578 # 2373 # 3438 @ 4775 # 8187

Ex Output:
4143


Ex Input:
298 @ 1699 @ 1367 @ 5001

Ex Output:
8365


Ex Input:
5930 # 1467 # 3134 @ 5197 @ 6804 # 4879 # 3826 @ 2210

Ex Output:

6835