private static HashSet <Nanobot> FindBiggestIntersection(Nanobot nanoRobot, Dictionary <Nanobot, HashSet <Nanobot> > nanoRobots)
{
var intersectingRobots = nanoRobots[nanoRobot];
var max = intersectingRobots
.Where(r => nanoRobot != r)
.Select(r =>
{
var ppp = FindIntersectingRobots(r, intersectingRobots).ToHashSet();
return(ppp);
})
.MaxBy(r => r.Count);
return(max);
}
private static HashSet <Nanobot> FindIntersectingRobots(Nanobot r, IEnumerable <Nanobot> nanoRobots)
{
return(nanoRobots
.Where(ro => ro.IsNanobotIntersecting(r))
.ToHashSet());
}