using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication9
{
    class Program
    {
        static void Main(string[] args)
        {

            int peaksNumber;
            int[] peaks;

            int entryPeak = 0;
            int quitPeak = 0;
            int wayLength = 1000001;


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

            peaks = new int[peaksNumber];


            for (int i = 0; i < peaksNumber; i++)
            {
                peaks[i] = int.Parse(Console.ReadLine());
            }

            Console.Write("\n");


            for (int i = 0; i < peaks.Length - 2; i++)
            {


                for (int j = i + 1; j < peaks.Length - 1; j++) // Ищём подъём
                {
                    if (peaks[j] > peaks[i])
                    {
                        for (int k = j + 1; k < peaks.Length; k++) // Ищём спуск
                        {
                            if (peaks[k] < peaks[j])
                            {
                                if ((k - i) < wayLength)
                                {
                                    entryPeak = i;
                                    quitPeak = k;
                                    wayLength = k - i;
                                    break;
                                }
                            }
                        }
                    }
                }
            }

            if (quitPeak != 0)
            {
                Console.WriteLine("{0}", entryPeak + 1);
                Console.WriteLine("{0},", quitPeak + 1);
            }
            else Console.WriteLine("0");

        }
    }
}