using System;

public class Program

{

    public static void Main()

    {

         int i = 0;

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

            int[] A;

            A = new int[N];

            Boolean KTMT = false;

            for (i=1;i<N; i++)

            {

                if (A[i]<=A[i+1])

                {

                    KTMT = true;

                }

                else

                {

                    KTMT = false;

                }

            }

            if (KTMT == true)

                {

                Console.WriteLine("Mang nay la mang tang dan");

                }

            else

            {

                Console.WriteLine("Mang nay ko la mang tang dan");

            }

            Console.ReadLine();

    }

}