static void Main(string[] args)
{
var dictPath = Directory.GetCurrentDirectory();
var input = Path.Combine(dictPath, "in.txt");
var output = Path.Combine(dictPath, "out.txt");
var content = File.ReadAllLines(input);
var length = int.Parse(content[0]);
var points = new PlanePoint[length];
for (int i = 1; i < length + 1; i++)
{
var row = content[i].Split(' ');
var x = int.Parse(row[0]);
var y = int.Parse(row[1]);
points[i - 1] = new PlanePoint(x, y, i);
}
var result = FindMinOstov(points);
var outContent = points.Select(point => point.NeighboringPoints).ToList();
var str = "";
for (int i = 0; i < outContent.Count; i++)
{
var listPoints = outContent[i].Select(point => point.Number).OrderBy(key => key).ToList();
for (var j = 0; j < listPoints.Count; j++)
{
var numberPoint = listPoints[j];
str += numberPoint + " ";
}
str += "0\r\n";
}
str += result;
File.WriteAllText(output, str);
}
public static int FindMinOstov(PlanePoint[] points)
{
if (points.Length == 0)
{
return(0);
}
var visitedPoints = new List <PlanePoint>();
var startPoint = points[0];
startPoint.Visited = true;
visitedPoints.Add(startPoint);
var sumDistnces = 0;
while (visitedPoints.Count < points.Length)
{
int minDistance = int.MaxValue;
PlanePoint nearestPoint = new PlanePoint();
PlanePoint actualPoint = new PlanePoint();
for (int i = 0; i < visitedPoints.Count; i++)
{
var point = visitedPoints[i];
for (int j = 0; j < points.Length; j++)
{
var otherPoint = points[j];
if (otherPoint.Visited)
{
continue;
}
var distance = point.DistanceToOtherPoint(otherPoint);
if (distance >= minDistance)
{
continue;
}
minDistance = distance;
actualPoint = point;
nearestPoint = otherPoint;
}
}
actualPoint.NeighboringPoints.Add(nearestPoint);
nearestPoint.NeighboringPoints.Add(actualPoint);
nearestPoint.Visited = true;
visitedPoints.Add(nearestPoint);
sumDistnces += minDistance;
}
return(sumDistnces);
}
public int DistanceToOtherPoint(PlanePoint otherPoint)
{
return(Math.Abs(X - otherPoint.X) + Math.Abs(Y - otherPoint.Y));
}