bfs已经过了，就是想试试记忆化搜索行不行，求大佬指点一下哪里还能优化
by _Victor @ 2022-11-15 18:23:39
输出改成printf或快写
by OldDriverTree @ 2022-11-15 18:32:00
printf也不行，还是TLE，我逝了
by Li_mz__ @ 2022-11-15 18:39:19
正解显然是 $bfs$。
by AC_CSP @ 2022-11-15 18:44:21
问题解决了
by _Victor @ 2022-11-15 18:58:22