#include <fstream>

#define NMAX 5007
#define INF 1 << 25

using namespace std;

ifstream f("subsir2.in");
ofstream g("subsir2.out");

int l[NMAX + 1], v[NMAX + 1], s[NMAX + 1];
int n, mini, nr,i,j,k;

int main(){
    f >> n;
    for (i = 1; i <= n; ++i)
        f >> v[i];
    v[0] = -INF;
    l[n]=1;
    s[n]=n;
    for (i = n-1; i >= 0; --i){
        mini = l[i] = INF;
        for (j = i + 1; j <= n; ++j){
            if ((v[j] < mini) && (v[i] <= v[j])){
                mini = v[j];
                nr = l[j] + 1;
                if ((l[i] == nr) && (v[j] < v[s[i]]))
                    s[i] = j;
                if (nr < l[i]){
                    l[i] = nr;
                    s[i] = j;
                }
            }
        }
        if (l[i] == INF){
            l[i] = 1;
            s[i] = i;
        }
    }
    g<< l[0] - 1 << '\n';
    k = 0;
    while(k != s[k]){
        g << s[k] << " ";
        k = s[k];
    }
    return 0;
}