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#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

struct Height
{
    short Height;
    short Position;
};

bool findPosition(short& position, Height& height)
{
    return position = height.Position;
}

bool compareByHeight(const Height& height, const Height& height2)
{
    return height.Height < height2.Height;
}

const short GetIndexWithSpecificNormalizeHeight(const short specificHeight, const std::vector<Height>& heights)
{
    for (short i = 0; i < heights.size(); ++i)
    {
        if (heights[i].Position == specificHeight)
        {
            return i;
        }
    }
}

int olol(std::vector<Height> heigths)
{
    int count = 0;
   // short graduates = 0;
   // cin >> graduates;
   //
   // std::vector<Height> heigths;
   //
   // for (short i = 0; i < graduates; ++i)
   // {
   //     short currentHeight = 0;
   //     cin >> currentHeight;
   //
   //     Height height = { currentHeight, i };
   //     heigths.push_back(height);
   // }
   //
   // sort(heigths.begin(), heigths.end(), compareByHeight);

    std::vector<short> results;
    while (true)
    {
        for (auto& height : heigths)
        {
            height.Height = 1; // to znaczy ze mozna go uzyc w algorytmie ponizej
        }

        auto resultSizeBeforeLoop = results.size();

        //auto tmpBegin = results.size()
        for (short i = 0; i < heigths.size(); ++i)
        {
            const auto currentHeight = heigths[i].Position;

            if (i != heigths[i].Position && heigths[i].Height == 1 && heigths[currentHeight].Height == 1)
            {
                heigths[i].Position = heigths[currentHeight].Position;
                heigths[currentHeight].Position = currentHeight;

                heigths[i].Height = 0;
                heigths[currentHeight].Height = 0;

                results.insert(results.begin(), i);
                results.push_back(currentHeight);
            }
        }

        //results.push_back(3001);

        if (resultSizeBeforeLoop == results.size())
        {
            return count;
           // break;
        }

       // cout << results.size() << endl;
        //for (const auto result : results)
        //{
        //}
            count++;

        results.clear();
    }

    //return count;

}

int main()
{
   // cout << olol() << endl;

    short graduates = 0;
    cin >> graduates;
    
    std::vector<Height> heigths;

    for (short i = 0; i < graduates; ++i)
    {
        short currentHeight = 0;
        cin >> currentHeight;
        
        Height height = { currentHeight, i };
        heigths.push_back(height);
    }

    sort(heigths.begin(), heigths.end(), compareByHeight);
    std::vector<short> results;

    cout << olol(heigths) << endl;
    while (true)
    {

        for (auto& height : heigths)
        {
            height.Height = 1; // to znaczy ze mozna go uzyc w algorytmie ponizej
        }

        auto resultSizeBeforeLoop = results.size();
        
        //auto tmpBegin = results.size()
        for (short i = 0; i < heigths.size(); ++i)
        {
            const auto currentHeight = heigths[i].Position;

            if (i != heigths[i].Position && heigths[i].Height == 1 && heigths[currentHeight].Height == 1)
            {
                heigths[i].Position = heigths[currentHeight].Position;
                heigths[currentHeight].Position = currentHeight;
                
                heigths[i].Height = 0;
                heigths[currentHeight].Height = 0;
                
                results.insert(results.begin(), i);
                results.push_back(heigths[currentHeight].Position);
            }
        }

        //results.push_back(3001);

        if (resultSizeBeforeLoop == results.size())
        {
            break;
        }

        cout << results.size() << endl;
        for (const auto result : results)
        {
            cout << result + 1 << " ";
        }  
        cout << endl;

        results.clear();
    }

    return 0;
}