using System;

​

public class Program{

    public static void Main(){

        int n = 10;

        printTri(n ,0);

    }

    private static void printTri(int length ,int spaceLength){

        if(length < 0){

            return;

        }

        int i;

        printTri(length - 1, spaceLength + 1);

        for (i = 0; i < spaceLength; i++){  

            Console.Write(" ");

        }  

        for (i = 0; i < length; i++){   

            Console.Write("* ");

        }

        //換行

        Console.WriteLine("");

    }

}