#include <iostream>

#include <algorithm>

#include <vector>

int main() {

    int n, r;

    n = ;

    r = ;

    std::vector<bool> v(n);

    std::fill(v.end() - r, v.end(), true);

    std::vector< std::vector<int> > sequence_vector;

    do {

        std::vector<int> sequence;

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

            if (v[i]) {

                std::cout << (i + ) << " ";

                sequence.push_back(i+);

            }

        }

        std::cout << "\n";

        sequence_vector.push_back(sequence);

    } while (std::next_permutation(v.begin(), v.end()));

    std::cout<<"from vector"<<std::endl;

    std::vector<int>::iterator iterator_sequence;

    std::vector< std::vector<int> >::iterator iterator_sequence_vector;

    for(iterator_sequence_vector = sequence_vector.begin();

      iterator_sequence_vector != sequence_vector.end(); iterator_sequence_vector++){

      for (iterator_sequence = (*iterator_sequence_vector).begin();

        iterator_sequence !=  (*iterator_sequence_vector).end(); iterator_sequence++){

        std::cout<<*iterator_sequence<<" ";

      }

      std::cout<<std::endl;

    }

    return ;

}