rt，蒟蒻一开始写的单桶，喜提30pts，后面把上下行分开了，用了两个桶，就AC了，求大佬指导： 30pts:https://www.luogu.com.cn/paste/3mbff90f 100pts:https://www.luogu.com.cn/paste/mqjmqp3e