using System;

public class Program

{

    public static void Main()

    {

        int num=int.Parse(Console.ReadLine());

        int current=1;

        bool isBigger=false;

        for(int rows=1; rows<=num; rows++)

        {

                for(int cols=1; cols <=rows;cols++)

                {

                    if(current>num)

                    {

                        isBigger=true;

                    break;

                    }

                    Console.Write(current + " ");

                    current++;

                }

            if(isBigger)

            {

                break;

            }

            Console.WriteLine();

        }

    }

}