Adv2016/D22.1/Program.cs

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

namespace D22._1
{
    public class Node
    {
        public int X { get; set; }
        public int Y { get; set; }
        public int Size { get; set; }
        public int Used { get; set; }
        public int Avail => Size - Used;

        public override bool Equals(object obj) => obj is Node node &&
                   X == node.X &&
                   Y == node.Y;

        public override int GetHashCode() => HashCode.Combine(X, Y);
    }

    class Program
    {

        static void Main(string[] args)
        {
            var contentList = File.ReadAllText(args[0])
                .Split(new [] { "\n", "\r\n" }, StringSplitOptions.RemoveEmptyEntries)
                .Skip(2)
                .Select(s => s.Split(' ', StringSplitOptions.RemoveEmptyEntries));

            var nodeList = new List<Node>();
            foreach (var content in contentList)
            {
                var n = new Node();
                n.X = int.Parse(content[0].Split("-")[1].Substring(1));
                n.Y = int.Parse(content[0].Split("-")[2].Substring(1));
                n.Size = int.Parse(content[1].TrimEnd('T'));
                n.Used = int.Parse(content[2].TrimEnd('T'));
                nodeList.Add(n);
            }

            var pairs = new HashSet<(Node, Node)>();
            foreach (var p1 in nodeList)
            {
                foreach (var p2 in nodeList)
                {
                    if (p1.Used == 0) continue;
                    if (p1.Equals(p2)) continue;
                    if (pairs.Contains((p2, p1))) continue;
                    if (p1.Used > p2.Avail) continue;
                    pairs.Add((p1, p2));
                }
            }

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