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:
2307 # 9363 @ 4926 @ 5635

Ex Output:
3505


Ex Input:
290 @ 5200 # 3274 # 8548

Ex Output:
-6332


Ex Input:
5945 @ 1046 @ 9187 @ 929

Ex Output:

17107