const std = require("tstl");

class Point
{
    constructor(x = Math.random() * 100, y = Math.random() * 100, z = Math.random() * 100)
    {
        this.x = x;
        this.y = y;
    }

    less(obj)
    {
        if (this.x === obj.x)
            return this.y < obj.y;
        else
            return this.x < obj.x;
    }
}

function main()
{
    let set = new std.TreeSet();
    for (let i = 0; i < 10; ++i)
        set.insert(new Point());

    for (let p of set)
        console.log(p);
}
main();