public void Test_Find()
{
QuickFinder uf = new QuickFinder(3);
uf.Union(0, 1);
uf.Union(0, 2);
Assert.Equal(2, uf.Find(1));
}
static void Main(string[] args)
{
var quickFinder = new QuickFinder(10);
quickFinder.Union(1, 3);
/*0 3 2 3 4 5 6 7 8 9 */
quickFinder.Union(3, 8);
/*0 8 2 8 4 5 6 7 8 9 */
quickFinder.Union(7, 4);
/*0 8 2 8 4 5 6 4 8 9 */
quickFinder.Union(5, 8);
/*0 8 2 8 4 8 6 4 8 9 */
Console.WriteLine(quickFinder.Find(1, 5));
quickFinder.Print();
}