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:
4193 @ 3477 # 3125 @ 6912 @ 2615 @ 9846 @ 9806 # 4965

Ex Output:
28759


Ex Input:
8771 @ 2575 # 7914 # 3691

Ex Output:
-259


Ex Input:
1275 @ 9214 @ 8865 @ 2154 @ 1450

Ex Output:

22958