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#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;

int main() {
    ios_base :: sync_with_stdio(false);
    int n; cin >> n;
    
    int ones = 0;

    for(int i = 0; i < n; i += 1) {
        int dg; cin >> dg;
        if(dg == 1)
            ones += 1;
    }

    int cost = max(2 - ones, 0);
    cout << cost << "\n";
    cout << 2 << "\n";

    cout << "1 2\n";
}