Adv2016/D24.2/Program.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using static D24._1.Program;

namespace D24._2
{
    class Program
    {
        static void Main(string[] args)
        {

            var file = File.ReadAllText(args[0]).Split(new[] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries);

            var poi = new Dictionary<int, (int x, int y)>();

            var map = ParseMap(file, poi);

            var perm = GetPermutations(poi.Keys.OrderBy(p => p).Skip(1), poi.Count - 1);

            int minStep = int.MaxValue;
            foreach (var p in perm)
            {
                var current = 0;
                int step = 0;
                foreach (var destination in p.Append(0))
                {
                    step += Solve(map, poi[current], poi[destination]);
                    current = destination;
                }

                if (step < minStep) minStep = step;
            }

            Console.WriteLine($"The answer is : {minStep}");
        }
    }
}