3
4
5
6
Seduce
2
1
A
B
C
The target column of the No. 3 plate is C, but there is already a top plate, our most intuitive reflection is - move the tray of the impeller to another pillar. So, what we have to do is (Law 2): Save the information of the current column (the column number, the number of the lower plate should be moved, and its target column), back to the present column after the obstacle is cleared Continue to move, convert the current column into the column where the tray is in the case. After suppose, we will move the No. 7 plate from A to C, at this time, the stack of the current column number must be empty. What should we do?
