using System;

public class Program

{

    public static int GetMinNumBoats(int[] arr, int limit) {

        Array.Sort(arr);

​

        int res = 0;

        int i = 0;

        int j = arr.Length - 1;

​

        while (i <= j)

        {

            if (i == j)

            {

                res++;

                break;

            }

​

            if (arr[i] + arr[j] <= limit)

            {

                res++;

                i++;

                j--;

                continue;

            }

​

            res++;

            j--;

        }

​

        return res;

    }

    public static void Main()

    {

        Console.WriteLine("UniLecs");

        // tests

        Console.WriteLine(GetMinNumBoats(new int[] { 1, 2 }, 3).ToString()); // 1

        Console.WriteLine(GetMinNumBoats(new int[] { 3,2,2,1 }, 3).ToString()); // 3

    }

}