Adv2016/D03.1/Program.cs

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

namespace D03._1
{
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length < 1) throw new ArgumentException();
            if (File.Exists(args[0]) == false) throw new FileNotFoundException();

            int answer = 0;

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

                    int[] l = line.Split(' ', StringSplitOptions.RemoveEmptyEntries).Select(s => int.Parse(s)).ToArray();

                    answer += l[0] + l[1] > l[2] && l[0] + l[2] > l[1] && l[1] + l[2] > l[0] ? 1 : 0;
                }
            }

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