BinNode<int> s = new BinNode<int>(8);
            BinNode<int> s2 = new BinNode<int>(1);
            BinNode<int> s3 = new BinNode<int>(9);
            s.SetLeft(s2);
            s.SetRight(s3);
            BinNode<int> s4 = new BinNode<int>(2);
            s2.SetLeft(s4);
            BinNode<int> s5 = new BinNode<int>(5);
            BinNode<int> s6 = new BinNode<int>(7);
            s3.SetLeft(s5);
            s3.SetRight(s6);
            BinNode<int> s7 = new BinNode<int>(0);
            s6.SetRight(s7);