private static string Print(Sky sky)
{
var builder = new StringBuilder();
var minX = sky.Lights.Min(l => l.Position.X);
var minY = sky.Lights.Min(l => l.Position.Y);
var maxX = sky.Lights.Max(l => l.Position.X);
var maxY = sky.Lights.Max(l => l.Position.Y);
for (var j = minY; j <= maxY; ++j)
{
for (var i = minX; i <= maxX; ++i)
{
builder.Append(sky.Contains(i, j) ? '#' : ' ');
}
builder.AppendLine();
}
return(builder.ToString());
}