using System;

public class Program

{

    public static int MaxBags(int[] capacity, int[] rocks, int additionalRocks) {

        for (int i = 0; i < capacity.Length; i++)

        {

            capacity[i] -= rocks[i];

        }

​

        Array.Sort(capacity);

​

        int result = 0;

        for (int i = 0; i < capacity.Length; i++)

        {

            if (capacity[i] > 0 && additionalRocks == 0)

                return result;

​

            if (capacity[i] == 0)

            {

                result++;    

            }

            else if (capacity[i] <= additionalRocks)

            {

                additionalRocks -= capacity[i];

                result++;

            }

        }

​

        return result;

    }

    public static void Main()

    {

        Console.WriteLine("UniLecs");

        // tests

        var capacity = new int[] { 2, 3, 4, 5 };

        var rocks = new int[] { 1, 2, 4, 4 };

        Console.WriteLine(MaxBags(capacity, rocks, 2).ToString()); // 3

    }

}