你不够努力,怎么变优秀! 你不够努力,怎么比别人强! 你不够努力,怎么能获奖! 订正地址: A题:https://www.luogu.com.cn/problem/CF427A B题:https://www.luogu.com.cn/problem/CF431B C题:https://www.luogu.com.cn/problem/CF435A