IEnumerable<VectorOption> options = GenerateOptions(hailstones[0], hailstones[1]);
foreach (Line hailstone in hailstones.Skip(2))
{
    options = FilterVectorOptions(hailstone, options);
}

VectorOption? theOption = options.FirstOrDefault();
if (theOption == null)
{
    Console.WriteLine("No solution found");
}
else
{
    Console.WriteLine($"Point found: {theOption.Line}");
    Console.WriteLine(theOption.Line.StartPoint.AddAllDimensions());
}

IEnumerable<VectorOption> GenerateOptions(Line line1, Line line2)
{
    for (int i = -500; i < 500; i++)
    {
        for (int j = -500; j < 500; j++)
        {
            VectorOption? option = FindVectorOptionFor(line1, line2, i, j);
            if (option != null)
            {
                yield return option;
            }
        }
    }
}

IEnumerable<VectorOption> FilterVectorOptions(Line hailstone, IEnumerable<VectorOption> vectorOptions)
{
    foreach (VectorOption option in vectorOptions)
    {
        (long time, Point point)? test = hailstone.Intersect(option.Line);
        if (test.HasValue && test.Value.time >= 0)
        {
            yield return option;
        }
    }
}