private void randomProblem_Click(object sender, EventArgs e)
{
if (Regex.IsMatch(this.tbProblemSize.Text, "^[0-9]+$"))
{
Random random = new Random();
int seed = random.Next(1000); // 3-digit random number
this.tbSeed.Text = "" + seed;
this.reset();
this.Invalidate();
}
else
{
MessageBox.Show("Problem size must be an integer.");
};
CityData.solveFurthest();
}
