#include <stdio.h>
#include <algorithm>
#define inf 1 << 30

using namespace std;

const int Mn = 1e5 + 6;


int n, ans,mn,poz,sol,minim;
int ar[5009], dp[5009], last[5009];

int main()
{
    freopen("subsir2.in","r",stdin);
    freopen("subsir2.out","w",stdout);

    scanf("%d", &n);
    for (int i = 1; i <= n; i++)
        scanf("%d", &ar[i]);

    for (int i = n; i >= 1; i--)
    {
        mn = inf;
        dp[i] = inf;
        for (int j = i + 1; j <= n; j++)
            if (mn > ar[j] && ar[i] <= ar[j])
            {
                mn = ar[j];
                if (dp[i] > dp[j] + 1)
                   dp[i] = dp[j] + 1, last[i] = j;
              else
                if (dp[i] == dp[j] + 1 && ar[last[i]] > ar[j])
                   last[i] = j;
            }

        if (dp[i] == inf)
           dp[i] = 1, last[i] = i;
    }
    mn = inf;
    poz = -1;
    sol = inf;
    minim = inf;
    for(int  i = 1; i <= n; i++)
    {
        if (mn > ar[i] && (dp[i] < sol || (dp[i] == sol && ar[i] < minim)))
        {
            sol = dp[i];
            poz = i;
            minim = ar[i];
        }
        if(mn > ar[i]) mn = ar[i];
    }
    printf("%d\n",sol);
    int it = poz;
    printf("%d ",poz);
    while (it != last[it])
    {
        it = last[it];
        printf("%d ", it);
    }

    return 0;
}