internal int Distance(Nanobot other)
{
int dx = this.x - other.x;
int dy = this.y - other.y;
int dz = this.z - other.z;
dx = dx > 0 ? dx : -dx;
dy = dy > 0 ? dy : -dy;
dz = dz > 0 ? dz : -dz;
return(dx + dy + dz);
}
private static int A(string[] input)
{
var bots = input.Select(i => Nanobot.fromString(i)).ToArray();
Nanobot best = bots[0];
foreach (var bot in bots)
{
if (bot.r > best.r)
{
best = bot;
}
}
return(bots.Count(b => b.Distance(best) <= best.r));
}
