Adv2015/D02.1/Program.cs

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

namespace D02._1
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1) return;
            if (File.Exists(args[0]) == false) throw new FileNotFoundException();

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

                    var dim = line.Split("x").Select(s => int.Parse(s)).ToArray();
                    int l = dim[0], w = dim[1], h = dim[2];

                    int side1 = l * w, side2 = w * h, side3 = h * l;
                    sq += 2 * side1 + 2 * side2 + 2 * side3 + Math.Min(side1, Math.Min(side2, side3));
                }
            }

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