public void AppleStocksTest()
        {
            int[] prices1   = { 100, 110, 120, 155, 140, 105 };
            int[] prices2   = { 100, 110, 80, 70, 115, 130 };
            int[] prices3   = { 100, 50, 110, 40, 120 };
            int   expected1 = 55;
            int   expected2 = 60;
            int   expected3 = 80;

            int result1 = Algorithm.AppleStocks(prices1);
            int result2 = Algorithm.AppleStocks(prices2);
            int result3 = Algorithm.AppleStocks(prices3);

            Assert.AreEqual(expected1, result1);
            Assert.AreEqual(expected2, result2);
            Assert.AreEqual(expected3, result3);
        }