io.open()
//-----------------------------------------
//此处输入代码

var fname = "C:\Users\Administrator\Desktop\uv.txt";
var content = string.load(fname); //读取数据
var t = string.split(content,'\n') //拆分行
var uid = {} //保存不重复用户
for k, v in t {
	if(v!="") { //非空行
		var note = string.split(v,' ') //或取行中用户名
		uid[note[2] ] = note[2] //添加入uid
	}
}
io.print( table.count(uid) ) //统计uid数

//-----------------------------------------
execute("pause")
io.close()