是n吧？
by bh1234666 @ 2018-02-02 16:56:08
哦，是k只
by bh1234666 @ 2018-02-02 16:58:01
翻译中也没说奶牛数，虽然英文题里说了n<=50000
by bh1234666 @ 2018-02-02 17:03:48
滑稽
by AubRain @ 2018-02-18 17:44:20