public void CountElementsTest_1()
        {
            var solution = new _1426_CountingElements();
            var result   = solution.CountElements(new int[] { 1, 2, 3 });

            Assert.AreEqual(2, result);
        }
        public void CountElementsTest_2()
        {
            var solution = new _1426_CountingElements();
            var result   = solution.CountElements(new int[] { 1, 1, 3, 3, 5, 5, 7, 7 });

            Assert.AreEqual(0, result);
        }