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:
2724 @ 8119 @ 1049 @ 9004

Ex Output:
20896


Ex Input:
8784 # 5145 @ 5652 @ 6871 @ 693

Ex Output:

16855