M

#define _CRT_SECURE_NO_DEPRECATE

#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <algorithm>

#define ull unsigned long long
#define ll long long

using namespace std;


int main() {
    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    int n;
    cin >> n;
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    vector<int> d(n, 1);
    vector<int> p(n, -1);
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < i; j++) {
            if (a[j] >= a[i]) {
                if (d[i] < d[j] + 1) {
                    p[i] = j;
                    d[i] = d[j] + 1;
                }
            }
        }
    }
    int ans = 0;
    for (int i = 0; i < n; i++) {
        if (d[i] > d[ans]) {
            ans = i;
        }
    }
    if (d[ans] <= 1) {
        cout << 0;
        return 0;
    }
    vector<int> r;
    cout << d[ans] << endl;
    while (p[ans] != -1) {
        r.push_back(ans + 1);
        ans = p[ans];
    }
    r.push_back(ans + 1);
    for (int i = r.size() - 1; i >= 0; i--) {
        cout << r[i] << endl;
    }

    return 0;
}