using System;

public class Program

{

    public static void Main()

    {

        //for(int i=0; i<=100; i++)

        //{

            //if(i%2 == 0)

            //Console.Write(i + ",");

        //}

        for(int x =1; x<=20; x++)

        {

            for(int i=1; i<=x; i++)

            {

                Console.Write("0 ");

            }

            Console.WriteLine("0");

        }

    }

}