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:
7021 # 2043 @ 7414 # 2632 @ 2939 @ 8718 @ 2731

Ex Output:
24148


Ex Input:
5088 # 9353 # 2772 @ 3908 @ 9196 @ 4709

Ex Output:
10776


Ex Input:
4846 # 5892 @ 8068

Ex Output:

7022