Jeff Zhao is P10.

JeffreyZhaoHentai.cs

    public class HentaiTextWriterUtils : ITextWriterUtils
    {
        private readonly static char[] Map = new[] {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};

        public void Write(ITextWriter writer, int value)
        {
            var i = value;
            var result = new char[11];
            var p = 10;
            var neg = value < 0;

            do
            {
                var q = 0;
                i = Math.DivRem(i, 10, out q);
                result[p--] = neg ? Map[-q] : Map[q];
            } while (i != 0);

            if (neg)
                result[p--] = '-';

            writer.Write(result, p+1, 10-p);
        }
    }