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 < 1) return;
            if (File.Exists(args[0]) == 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 < 500; x++)
            {
                for (uint y = 0; y < 500; y++)
                {
                    var total = GetTotalDistance(coordinates, x, y);
                    if (total < 10000) area++;
                }
            }

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

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