#include<iostream>
#include<fstream>
#include<vector>

using namespace std;

int main() {
    int sum;
    int16_t n, i, average;
    vector<int16_t> high;

    ifstream input("input.txt");

    cin >> n;
    if (n <= 0) {
        return 0;
    }
    vector<int16_t> days(n);

    for (i = 0; i <= n - 1; ++i) {
        cin >> days[i];
        sum += days[i];
    }

    average = sum / n;

    for (i = 0; i <= n - 1; ++i) {
        if (days[i] > average) {
            high.push_back(i);
        }
    }

    cout << high.size() << endl;
    for (auto i : high) {
        cout << i << " ";
    }

    return 0;
}