private void button3rdAlgorithm_Click(object sender, EventArgs e)
{
string from = checkedListBoxFrom.SelectedItem.ToString();
string to = checkedListBoxTo.SelectedItem.ToString();
richTextBox1.Text = Builder.NoStairsPath(from, to);
if (Builder.Result == $"No path without stairs from {from} to {to} found.\nTry another way.")
{
Builder.Result = "";
richTextBox1.Text = Builder.FindPathWithLift(from, to);
}
richTextBox2.Text = Builder.Result;
}
