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:
2863 @ 9899 # 2358

Ex Output:
10404


Ex Input:
1737 # 3662 # 9496 @ 694

Ex Output:
-10727


Ex Input:
4104 # 658 @ 2977 @ 8962 @ 4165 @ 5503 @ 6932

Ex Output:

31985