using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace SmallestDifference

{

    class Program

    {

        static void Main(string[] args)

        {

            int[] first = new int[6];

            int[] second = new int[5];

            Initialize(first, second);

            var result = SmallestDifference(first, second);

            Console.Write($"{result[0]}, {result[1]}");

        }

​

        private static int[] SmallestDifference(int[] first, int[] second)

        {

            Array.Sort(first);

            Array.Sort(second);

​

            int[] result = new int[2];

​

            var firstLength = first.Length;

            var secondLength = second.Length;

​

            var firstCounter = 0;

            var secondCounter = 0;

​

            var smallestDifference = Int32.MaxValue;

​

            while (firstLength != firstCounter && secondLength != secondCounter)

            {

                var left = first[firstCounter];

                var right = second[secondCounter];

​

                var currentDifference = Math.Abs(left - right);

​

                if (currentDifference < smallestDifference)

                {

                    smallestDifference = currentDifference;

                    result[0] = left;

                    result[1] = right;

                }

​

                if (left < right)

                    firstCounter++;

                else

                    secondCounter++;

​

​

            }

​

            return result;

        }

​

​

        static void Initialize(int[] first, int[] second)

        {

            first[0] = -1;

            first[1] = 5;

            first[2] = 10;

            first[3] = 20;

            first[4] = 28;

            first[5] = 3;

​

            second[0] = 26;

            second[1] = 134;

            second[2] = 135;

            second[3] = 15;

            second[4] = 17;

        }

    }

}

​