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: 1917 @ 4353 @ 4321 @ 3060 @ 6681 @ 7890 @ 8148

Output: 36370


Input: Consider Input: 2026 @ 9494 # 8161

Output: 3359


Input: Consider Input: 1153 # 2728 @ 5577 @ 2791 @ 6744 @ 139


Output: 13676