using System;

​

public class Program

{

    public static void Main()

    {

        for (int i = 0; i < 10; i++)

        {

            for (int j = 0; j < 10; j++)

            {

                if (j > i)

                {

                    break;

                }

​

                Console.Write($"{j}");

            }

​

            Console.WriteLine();

        }

    }

}