Matthieu MEZIL

static IEnumerable<KeyValuePair<int, int>> SuccessiveIterationMax(IEnumerable<int> values)

{

    return from v in values.Distinct()

           let max = values.Select((value, index) => values.Skip(index).TakeWhile(v2 => v2 == v).Count()).Max()

           select new KeyValuePair<int, int>(v, max);

}

static IEnumerable<KeyValuePair<int, int>> SuccessiveIterationMax(IEnumerable<int> values)

{

    return from v in values.Distinct()

           select new KeyValuePair<int, int>(v, SuccessiveIterationLength(values, v).Max());

}

static IEnumerable<int> SuccessiveIterationLength(IEnumerable<int> values, int value)

{

    while (values.Any())

    {

        values = values.SkipWhile(v => v != value);

        int result = values.TakeWhile(v => v == value).Count();

        yield return result;

        values = values.Skip(result);

    }

    yield return 0;

}

static void Main(string[] args)

{

    var tab = new int[] { 3, 1, 2, 1, 1, 2, 3, 1, 1, 1, 2, 2, 3, 2, 2, 2, 2 };

    foreach (var v in from v in tab.Distinct()

                      let max = tab.Select((value, index) => tab.Skip(index).TakeWhile(v2 => v2 == v).Count()).Max()

                      orderby max descending, v

                      select new KeyValuePair<int, int>(v, max))

        Console.WriteLine("{0} : {1}", v.Key, v.Value);

}