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:
9629 @ 3687 @ 328

Ex Output:
13644


Ex Input:
5193 # 9816 # 9875 # 1011 @ 1147 @ 5023

Ex Output:
-9339


Ex Input:
5964 @ 2336 # 6119 @ 2379 @ 7436 # 5898 # 2754

Ex Output:

3344