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:
5662 @ 7781 # 5682 @ 864 @ 6796 @ 2353 @ 1100 # 7566

Ex Output:
11308


Ex Input:
3080 @ 8133 @ 5605 @ 7021

Ex Output:

23839