public void Test13Factors()
        {
            int    n      = 13;
            string numStr = ProblemSeries.RemoveWhitespace();
            var    prob   = new Prob8(numStr);
            var    result = prob.MaxProductForWindow(n);

            Assert.AreEqual(23514624000, result.Value);
            TestUtils.WriteOut(result.PrettyPrint());
        }
        public void Test4Factors()
        {
            int    n      = 4;
            string numStr = ProblemSeries.RemoveWhitespace();
            var    prob   = new Prob8(numStr);
            var    result = prob.MaxProductForWindow(n);

            //9 × 9 × 8 × 9 = 5832
            Assert.AreEqual(5832, result.Value);
        }