using System;

using System.Collections.Generic;

public class Program

{

    // [-1, 3, 8, 2, 9, 5]

    // [4, 1, 2, 10, 5, 20]

    // Find pair from each array that's closest to target

    public static void Main()

    {

        const int target = 24;

        var array1 = new List<int>() {-1, 3, 8, 2, 9, 5};

        var array2 = new List<int>() {4, 1, 2, 10, 5, 20};

        var topNumber = 0;

        string numbersAdded;

        foreach(var array1num in array1){

            foreach(var array2num in array2){

                var sum = array1num + array2num;

                Console.WriteLine($"{array1num}+{array2num}={sum}");

                if (sum < target && sum > topNumber){

                    numbersAdded = $"{array1num} + {array2num}";

                    topNumber = sum;

                } 

            }

        }

        Console.WriteLine($"{topNumber}");

    }

}