using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        {

            var a =  new int[]{1,2,3};

            Console.WriteLine(a.All(x=>x<5)); // True

        }

        {

            var a =  new int[]{1,2,3,7};

            Console.WriteLine(a.All(x=>x<5)); // False

        }

        {

            var a =  new int[]{};

            Console.WriteLine(a.All(x=>x<5)); // True

        }

    }

}