650. 2 Keys Keyboard

There is only one character 'A' on the screen of a notepad. You can perform one of two operations on this notepad for each step: - Copy All: You can copy all the characters present on the screen (a partial copy is not allowed). - Paste: You can paste the characters which are copied last time. Given an integer n, return the minimum number of operations to get the character 'A' exactly n times on