[Youku - 요우쿠]  for Chinese


▼ Direct (연출)


https://v.youku.com/v_show/id_XNDEyMjM4MDcyOA==.html?spm=a2h3j.8428770.3416059.1


▼ Explanation (해법)


https://v.youku.com/v_show/id_XNDEyMjQyNTY1Ng==.html?spm=a2h3j.8428770.3416059.1