%e9%83%a8%e7%bd%b2%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e6%97%b6%e5%80%99%e5%a6%82%e4%bd%95%e4%bf%9d%e8%af%81uid%e4%b8%80%e8%87%b4

面试题%e9%83%a8%e7%bd%b2%e6%9c%8d%e5%8a%a1%e5%99%a8%e7%9a%84%e6%97%b6%e5%80%99%e5%a6%82%e4%bd%95%e4%bf%9d%e8%af%81uid%e4%b8%80%e8%87%b4

return top