Adv2018/D6.2/Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace D6._2
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 3) return;
            if (File.Exists(args[0]) == false) return;
            if (int.TryParse(args[1], out int size) == false) return;
            if (int.TryParse(args[2], out int ceil) == false) return;

            var coordinates = new List<(uint x, uint y)>();

            var file = File.OpenText(args[0]);

            do
            {
                var line = file.ReadLine();
                if (line == null) break;

                var cl = line.Split(", ");
                coordinates.Add((uint.Parse(cl[0]), uint.Parse(cl[1])));
            } while (true);

            int area = 0;

            for (uint x = 0; x < size; x++)
            {
                for (uint y = 0; y < size; y++)
                {
                    var total = GetTotalDistance(ceil, coordinates, (x, y));
                    if (total < ceil) area++;
                }
            }

            Console.WriteLine($"Answer : {area}");
        }

        private static int GetTotalDistance(int ceil, List<(uint x, uint y)> coordinates, (uint x, uint y) point)
        {
            int total = 0;
            for (int i = 0; i < coordinates.Count; i++)
            {
                var (x, y) = coordinates[i];
                var manhattan = Math.Abs((int)point.x - (int)x) + Math.Abs((int)point.y - (int)y);
                total += manhattan;

                if (total >= ceil) break;
            }
            return total;
        }
    }
}