using System;

​

public class td2

{

    static void exercice10(){

        Console.WriteLine("entrez un entier n");

        int n = Convert.ToInt32(Console.ReadLine());

​

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

        {

            for (int k = 0; k <= n - i; k++)

            {

                Console.Write(" ");

            }

            for (int j = 1; j <= 2*i-1; j++)

            {

                Console.Write("*");

            }

            Console.WriteLine();

        }

    }

​

    public static  void Main(string[] args)

    {

        //exercice1();

        exercice10();

    }

​

}