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

Input: Consider Input: 3462 @ 9743 @ 8298

Output: 21503


Input: Consider Input: 5046 # 9480 # 3079 @ 8929 # 1334 # 6211 @ 3240 @ 3825

Output: 936


Input: Consider Input: 7509 # 3990 @ 168 # 360


Output: 3327