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:
9781 # 2797 # 2134

Ex Output:
4850


Ex Input:
1919 @ 7586 # 3931 @ 8451 # 8366

Ex Output:
5659


Ex Input:
4809 @ 810 # 8559 @ 4203 @ 6893 @ 5765

Ex Output:

13921