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: 9549 @ 21 # 6714 # 2406 # 2527 # 8527 @ 1769

Output: -8835


Input: Consider Input: 2285 @ 1970 @ 4720

Output: 8975


Input: Consider Input: 3034 @ 2718 @ 4313 @ 2233 @ 151


Output: 12449