三色旗是假设有一条绳子，上面有红、白、蓝三种颜色的旗子，起初绳子上的旗子颜色并没有顺序，您希望将之分类，并排列为蓝、白、红的顺序，要如何移动次数才会最少，注意您只能在绳子上进行这个动作，而且一次只能调换两个旗子。-Tricolore is assuming a rope above a red, white and blue flag, the flag colors rope initially did not order, you want to the classification and arrangement of blue, white, red order to How will the minimum number of moves, note that you can only perform this action on the rope, and one can only exchange the two flags.