using System;

​

public class Program

{

    public static void Main()

    {

        int n = 7;

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

        {

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

            {

                Console.Write(j + "\t");

            }

​

            Console.Write("\n");

        }

    }

}