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#include <iostream>
#include <algorithm>

using namespace std;

const int MAX_N = 3009;
pair<int, int> tab[MAX_N];
//int scaled_tab[MAX_N];
vector <int> scaled_tab;
int switch_table[MAX_N];
bool this_was_switched[MAX_N];
int n;
bool visited[MAX_N];

pair<int, int> output[MAX_N];
int output_iterator = 0;


pair<int, int> output2[MAX_N];
int output2_iterator = 0;

void calc_swaps(int id){
	int cur_id = id;
	int cur_val = scaled_tab[cur_id];
	int paired_id = distance(scaled_tab.begin() , find(scaled_tab.begin(), scaled_tab.end(), cur_id));
	this_was_switched[cur_id] = true;
	this_was_switched[cur_val] = true;

	if(scaled_tab[scaled_tab[paired_id]] == paired_id){
		return;
	}

	if(scaled_tab[paired_id] == paired_id) return;


	scaled_tab[paired_id] = scaled_tab[cur_val];
	scaled_tab[cur_val] = cur_id;
	output[output_iterator] = {paired_id, cur_val};
	output_iterator++;

	if(scaled_tab[paired_id] == paired_id){
		this_was_switched[paired_id] = true;
	}
	else if(scaled_tab[scaled_tab[paired_id]] == paired_id){
		this_was_switched[paired_id] = true;
		this_was_switched[scaled_tab[paired_id]] = true;
	}
	else{
		calc_swaps(paired_id);
	}

}

void switch_them(int a, int b){
	int buf;
	buf = scaled_tab[a];
	scaled_tab[a] = scaled_tab[b];
	scaled_tab[b] = buf;
}

void dbg(){
	cout<<"\n";
	cout<<"DEBUG DEBUG DEBUG DEBUG\n";
	for(int i = 0; i <n; i++){
		cout<<scaled_tab[i]<<" ";
	}
	cout<<"\nDEBUG DEBUG DEBUG DEBUG\n";
}

int main()
{
    //int n;
    cin.tie(0);
    cout.tie(0);
    ios_base::sync_with_stdio(0);
    cin>>n;
	scaled_tab.resize(n);
	int a;

	for(int i = 0; i < n; i++){
		cin>>a;
		tab[i] = {a, i};
	}

	sort(tab, tab+n);

	for(int i = 0; i < n; i++){
		scaled_tab[tab[i].second] = i;
	}

	bool single_round = true;

	for(int i = 0; i < n; i++){

		if(scaled_tab[i] == i);
		else if(scaled_tab[scaled_tab[i]] == i);
		else{
			single_round = false;
			break;
		}
	}

	for(int i = 0; i <= n; i++){
		if(i == n){
			cout<<0;
			return 0;
		}
		if(scaled_tab[i] != i){
			break;
		}
	}

	if(single_round){
		cout<<1<<"\n";
		for(int i = 0; i < n; i++){
			if(scaled_tab[i] != i and visited[i] == false){
				output2[output2_iterator] = {i, scaled_tab[i]};
				visited[scaled_tab[i]] = true;
				output2_iterator++;
			}
		}

		//output2_iterator/=2;

		cout<<output2_iterator * 2<<"\n";

			for(int i = 0; i < output2_iterator; i++){
				cout<<output2[i].first + 1<<" ";
				///switch_them(output2[i].first, output2[i].second);
			}
			for(int i = output2_iterator - 1; i >= 0; i--){
				cout<<output2[i].second + 1<<" ";
			}

			///dbg();
	}
	else{
		cout<<2<<"\n";
		int correct_count = 0;
		int id_zamiany;

		for(int i = 0; i < n; i++){
			if(scaled_tab[i] == i) correct_count++;
		}

		if(((n - correct_count)%2) == 5){



		}
		else{
			for(int i = 0; i < n; i++){
				if(this_was_switched[i] == false){
					calc_swaps(i);
				}
			}

			cout<<output_iterator * 2<<"\n";

			for(int i = 0; i < output_iterator; i++){
				cout<<output[i].first + 1<<" ";
				//switch_them(output[i].first, output[i].second);
			}
			for(int i = output_iterator - 1; i >= 0; i--){
				cout<<output[i].second + 1<<" ";
			}

			//dbg();
		}
		cout<<"\n";

		for(int i = 0; i < n; i++){
			if(scaled_tab[i] != i and visited[i] == false){
				output2[output2_iterator] = {i, scaled_tab[i]};
				visited[scaled_tab[i]] = true;
				output2_iterator++;
			}
		}
		//output2_iterator/=2;

		cout<<output2_iterator * 2<<"\n";

			for(int i = 0; i < output2_iterator; i++){
				cout<<output2[i].first + 1<<" ";
				///switch_them(output2[i].first, output2[i].second);
			}
			for(int i = output2_iterator - 1; i >= 0; i--){
				cout<<output2[i].second + 1<<" ";
			}

		///dbg();
	}
    return 0;
}