using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        int[]a={100,3,100,85,92,200,5,78,80,98,87,50,300,3,89,85,80};

        int p=lessthan55(a,200);

        Console.WriteLine(p);

        double[]k=getavg(a);

        print(k);

    }

    public static void print(double[]a)

    {

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

        {

            Console.Write(a[i] + " ");

        }

    }

    public static int lessthan55(int[]a,int n)

    {

        int c=0;

        for(int i=0;i<a.Length;i=i+2+a[i+1])

        {

            if(a[i]==n)

            {

                for(int j=i+2;j<i+2+a[i+1];j++)

                {

                    if(a[j]<55)

                        c++;

                }

            }

        }

        return c;

    }

    public static double[] getavg(int[]a)

    {

        int cnt=0,d=0;

        for(int i=0;i<a.Length;i=i+2+a[i+1])

        {

            cnt++;

        }

        double[]b=new double[cnt*2];

        for(int i=0;i<a.Length;i=i+2+a[i+1])

        {

            b[d]=a[i];

            d+=2;

        }

        d=1;

        int sum=0;

        for(int i=0;i<a.Length;i=i+2+a[i+1])

        {

            sum=0;

            for(int j=i+2;j<i+2+a[i+1];j++)

            {

                sum+=a[j];

            }

            double avg=sum/a[i+1];

            b[d]=avg;

            d+=2;

        }

        return b;

    }

}