public void SumNumbersTest_1()
        {
            var root     = TestHelper.GenerateTree(new int?[] { 1, 2, 3 });
            var solution = new _0129_SumRootToLeafNumbers();

            Assert.AreEqual(25, solution.SumNumbers(root));
        }
        public void SumNumbersTest_2()
        {
            var root     = TestHelper.GenerateTree(new int?[] { 4, 9, 0, 5, 1 });
            var solution = new _0129_SumRootToLeafNumbers();

            Assert.AreEqual(1026, solution.SumNumbers(root));
        }