Room 1 Room 2 o0O0。O m八m B X 口 A Problem 冷 Conditions Two opaque and completely separated rooms are very close to each other Room 1 contains 3 switches and room 2 contains 3 lights Each switch is corresponding to one and only one light You can switch on/off any switch for any times But you can only enter each room for only once , Goal: finding which switch is corresponding to which light Center of speech Technology, Tsinghua University Slide 8Center of Speech Technology, Tsinghua University Slide 8 ❑ A Problem ❖ Conditions: ➢ Two opaque and completely separated rooms are very close to each other. ➢ Room 1 contains 3 switches and Room 2 contains 3 lights. ➢ Each switch is corresponding to one and only one light. ➢ You can switch on/off any switch for any times. ➢ But you can only enter each room for only once. ❖ Goal: finding which switch is corresponding to which light. Room 1 Room 2 A B C X Y Z