using System;

public class Program

{

    public static bool IsExist(int[] arr, int n)

    {

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

        {

            if (n == arr[i])

                return true;

        }

        return false;

    }

​

    public static bool AllIncluded(int[] a, int[] b)

    {

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

        {

            if (IsExist(a, b[i]) == false)

                return false;

        }

        return true;

    }

​

    static void Main()

    {

        int[]a = new int[] {18,5,9,6,8,22,13,7};

        int[]b = new int[] {22,5,13};

        Console.WriteLine(AllIncluded(a,b));

    }

}