调试中...
username =
["joe","joe","joe","james","james","james","james","mary","mary","mary"]
timestamp =
[1,2,3,4,5,6,7,8,9,10]
website =
["home","about","career","home","cart","maps","home","home","about","career"]
["joe","joe","joe","james","james","james","james","mary","mary","mary"]
[1,2,3,4,5,6,7,8,9,10]
["home","about","career","home","cart","maps","home","home","about","career"]
["ua","ua","ua","ub","ub","ub"]
[1,2,3,4,5,6]
["a","b","a","a","b","c"]