# Íæ¼ÒµÇ¼ѧϰ¼¼ÄÜ
# {ְҵϵ:[µÇ¼¼´¿ÉѧϰµÄ¼¼ÄÜÁбí], ...}
# ְҵϵ: 0-սʿϵ; 1-·¨Ê¦Ïµ; 2-¹­¼ýϵ

(

{

0:[],
1:[],
2:[],

}

)