private void deleteBtn_Click(object sender, EventArgs e)
{
if (delBox.Text.Length != 0)
{
Stopwatch sw = new Stopwatch();
sw.Start();
Algoritmi.IzbrisiCvor(Convert.ToInt32(delBox.Text));
sw.Stop();
timeLabel.Text = sw.ElapsedMilliseconds.ToString() + " ms";
Algoritmi.graphicsObj.Clear(Color.DimGray);
Algoritmi.CrtajSve(Algoritmi.root, 1, 50, drawPanel.Width / 2);
}
delBox.Text = "";
}