CodeEval Fizz Buzz (001)

fizzbuzz.cs

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

namespace Solutions
{
    public class Program
    {
        static void Main(string[] args)
        {
            var lines = new List<string>();

            using (var reader = File.OpenText(args[0]))
            while (!reader.EndOfStream)
            {
                var line = reader.ReadLine();
                if(null == line)
                    continue;
                lines.Add(line);
            }

            Console.Write(String.Join("\n", FizzBuzz.Solve(lines.ToArray())));
        }
    }

    public class FizzBuzz
    {
        public static string[] Solve(string[] lines)
        {
            var result = new string[lines.Length];

            for (var i = 0; i < lines.Length; i++)
            {
                result[i] = SolveLine(lines[i]);
            }

            return result;
        }

        private static string SolveLine(string line)
        {
            var split = line.Trim().Split(' ');

            if (split.Length != 3)
                throw new ArgumentException("Line does not contain 3 space-separated parts", "line");

            var a = int.Parse(split[0]);
            var b = int.Parse(split[1]);
            var n = int.Parse(split[2]);

            var result = Enumerable.Range(1, n).Select(i =>
            {
                var ar = (i % a) == 0;
                var br = (i % b) == 0;

                if (ar && br)
                    return "FB";
                if (ar)
                    return "F";
                if (br)
                    return "B";

                return i.ToString();
            });

            return String.Join(" ", result);
        }
    }
}