public void ArrayAlgorithms_FindCombinationSuchThatPHValueIsNeutralized_Test()
        {
            // Arrange
            var input = new PhValue[] { new PhValue() { Element = "CA", Value = -3 }, new PhValue() { Element = "AR", Value = 3 }, new PhValue() { Element = "MN", Value = 6 }, new PhValue() { Element = "PD", Value = 8 } };

            // Act
            ArrayAlgorithms.FindCombinationSuchThatPHValueIsNeutralized(input);
        }
        /// <summary>
        /// An array is given with element name and their respective pH values. Print the combination of 2 elements which make a neutral compound
        /// </summary>
        /// <param name="input"></param>
        public static void FindCombinationSuchThatPHValueIsNeutralized(PhValue[] input)
        {
            var map = new Dictionary<int, string>();
            foreach (var phValue in input)
            {
                if (!map.ContainsKey(-phValue.Value))
                {
                    map.Add(phValue.Value, phValue.Element);
                }

                else
                {
                    Console.WriteLine(phValue.Element + "," + map[-phValue.Value]);
                    break;
                }
            }
        }