#include <iostream>
#include <vector>
#include <algorithm>
#include <sstream>
#include <fstream>
#include <string>

using namespace std;

vector<int> pizzas;

vector<bool> used;

int main() {

    string fileName;
    cin >> fileName;

    ifstream file("C:\\Projects\\Hashcode2020\\" + fileName + ".in");
    ofstream result("C:\\Projects\\Hashcode2020\\" + fileName + ".txt");

    int maxPizzaSize, typesOfPizza;
    file >> maxPizzaSize >> typesOfPizza;

    pizzas.resize(typesOfPizza);
    used.resize(typesOfPizza);

    for (int i = 0; i < typesOfPizza; i++) {
        file >> pizzas[i];
    }

    sort(pizzas.begin(), pizzas.end());
    vector<int>::iterator end = pizzas.end();
    while (true) {

        vector<int>::iterator low = lower_bound(pizzas.begin(), end, maxPizzaSize);
        int index = (low - pizzas.begin()) - 1;
        if (index < 0) {
            break;
        }
        maxPizzaSize -= pizzas[index];
        if (maxPizzaSize < 0) {
            break;
        }
        end = low - 1;
        used[index] = true;
    }

    stringstream s;
    int counter = 0;

    for (int i = 0; i < used.size(); i++) {
        if (used[i]) {
            counter++;
            s << i << " ";
        }
    }
    result << counter << endl;
    result << s.str() << endl;

    cout << "Successfully created file " + fileName << ".txt" << endl;
    cin >> maxPizzaSize;
    return 0;
}