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:
3007 @ 8777 # 8750

Ex Output:
3034


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

Ex Output:
10776


Ex Input:
5449 @ 3618 @ 5983 # 7280 # 9348 # 5849

Ex Output:

-7427