作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 递归 素数分解 日期 题目地址:https://leetcode.com/problems/2-keys-keyboard/description/ 题目描述 Initially on a notepad only one character 'A' is present. You can perform two operations on this