@[雪夜yukiyo](/user/540658) 应该是先递归，因为要把他原来的给预处理好
by FiraCode @ 2022-10-09 19:04:58
@[FiraCode](/user/528430) 先标记父节点再计算对吗
by 雪夜yukiyo @ 2022-10-09 19:20:37
@[雪夜yukiyo](/user/540658) 就是先find再整合
by FiraCode @ 2022-10-09 19:58:50