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:
1774 # 6033 # 3757 @ 3570 @ 6463 # 5537

Ex Output:
-3520


Ex Input:
8771 @ 2575 # 7914 # 3691

Ex Output:
-259


Ex Input:
4281 @ 1089 # 6646 # 9917 # 7556 @ 2845

Ex Output:

-15904