6 7 8 9 10
1 1 12 13 14 15
16 17 18 19 20
2 1 22 23 24 25
You can only walk to the adjacent room, such as 7 to 6.2.8. 12.
The door on the left is-1, on the right is +5, on the left is -5, and on the right is+1.
Remember that the room refers to the room you have been to. For example, 1-2 is Room 2 on the 1 floor.
There are generally 2-4 downward stairs on the second floor. The best way to improve the progress is to let senior people take you to brush.