Adv2016/D08.1/Program.cs

using System;
using System.IO;
using System.Linq;

namespace D08._1
{
    class Program
    {
        static readonly int W = 50, H = 6;
        static bool[,] LCD = new bool[H, W];

        static void DrawRect(int w, int h)
        {
            for (var i = 0; i < h; i++)
                for (var j = 0; j < w; j++)
                    LCD[i, j] = true;
        }

        static void RotateRow(int r, int d)
        {
            var row = new bool[W];
            for (var i = d; i < W + d; i++) row[i % W] = LCD[r, i - d];
            for (var i = 0; i < W; i++) LCD[r, i] = row[i];
        }

        static void RotateColumn(int c, int d)
        {
            var col = new bool[H];
            for (var i = d; i < H + d; i++) col[i % H] = LCD[i - d, c];
            for (var i = 0; i < H; i++) LCD[i, c] = col[i];
        }

        static void Main(string[] args)
        {
            if (args.Length < 1) throw new ArgumentException();
            if (File.Exists(args[0]) == false) throw new FileNotFoundException();

            using (var file = File.OpenText(args[0]))
            {
                while (true)
                {
                    var line = file.ReadLine();
                    if (line == null) break;

                    if (line.StartsWith("rect "))
                    {
                        var lr = line.Split(" ")[1].Split("x");
                        DrawRect(int.Parse(lr[0]), int.Parse(lr[1]));
                    }

                    if (line.StartsWith("rotate "))
                    {
                        var words = line.Split(" ");
                        var type = words[1];
                        var rc = words[2].Split("=")[1];
                        var d = words[4];

                        if (type == "row") RotateRow(int.Parse(rc), int.Parse(d));
                        if (type == "column") RotateColumn(int.Parse(rc), int.Parse(d));
                    }
                }
            }

            int answer = Print();

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

        private static int Print()
        {
            int answer = 0;
            for (var i = 0; i < H; i++)
            {
                for (var j = 0; j < W; j++)
                {
                    if (LCD[i, j]) answer++;
                    Console.Write(LCD[i, j] ? '#' : '.');
                }
                Console.WriteLine();
            }
            Console.WriteLine();

            return answer;
        }
    }
}