Adv2015/D02.2/Program.cs

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

namespace D02._2
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1) return;
            if (File.Exists(args[0]) == false) throw new FileNotFoundException();

            int ft = 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 peri1 = 2 * l + 2 * w, peri2 = 2 * w + 2 * h, peri3 = 2 * h + 2 * l;
                    ft += Math.Min(peri1, Math.Min(peri2, peri3)) + l * h * w;
                }
            }

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