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: 2307 # 9363 @ 4926 @ 5635

Output: 3505


Input: Consider Input: 9645 @ 911 @ 6748 # 3005 # 3625 # 87 @ 3003 # 5587 # 1382

Output: 6621


Input: Consider Input: 9083 # 6210 @ 1974 @ 7731 # 2015 @ 2274


Output: 12837