#include <stdio.h>

#define MAXN 10000000
static int Bpopulace[MAXN];
static int Bpozice[MAXN];
static int velikostB;
static int Apopulace, Apozice;

int main (void)
{
  int N, i, x;

  scanf ("%d", &N);
  Apopulace = -1;
  Apozice = -1;
  velikostB = 0;
  for (i = 0; i < N; i++)
    {
      scanf ("%d", &x);
      if (x < Apopulace)
	{
	  printf ("%d %d %d\n", Apozice, Bpozice[velikostB - 1], i + 1);
	  return 0;
	}
      while (velikostB && Bpopulace[velikostB - 1] < x)
	{
	  velikostB--;
	  Apopulace = Bpopulace[velikostB];
	  Apozice = Bpozice[velikostB];
	}
      Bpopulace[velikostB] = x;
      Bpozice[velikostB] = i + 1;
      velikostB++;
    }

  printf ("nelze\n");

  return 0;
}