public void Test_DifficultWay()
        {
            int expectedResult = 21;

            FindHappyTicket actualResult = new FindHappyTicket();

            Assert.AreEqual(expectedResult, actualResult.DifficultWay(321000, 322000));
        }
        public void Test_SimpleWay()
        {
            int expectedResult = 28;

            FindHappyTicket actualResult = new FindHappyTicket();

            Assert.AreEqual(expectedResult, actualResult.SimpleWay(321000, 322000));
        }