详细过程: 1 2 2 2 1 1 1 3 3 3 1 1 2 2 2 1 1 (2) 1 3 3 3 1 1 2 2 2 1 1 2 1 3 3 3 1 1 2 2 2 1 (1) 1 2 1 3 3 3 1 1 1 3 3 3 1 1 1 3 (3) 3 3 1 完成 by Link_Cut_qwq @ 2021-11-25 00:12:58