import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args)
	{
		int n;
		Scanner s = new Scanner(System.in);
		n = s.nextInt();
		double[] x = new double[n];
		for(int i=0; i<n; i++){
			x[i]=s.nextInt();
		}
		for(int j=1; j<=(n-2); j++){
			if((x[j]>x[j+1])&&(x[j]>x[j-1])){
				System.out.println(j + " ");
			}	
		}
	}
}