problem

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

typedef vector<int>     VI;
typedef vector<string>  VS;
typedef vector<VI>  MI;

 void escriuv(VI& v, VS& p, int subsets){
  bool first = true;
  for(int s = 0; s < subsets; ++s){
    first = true;
      cout << "subconjunt " << s+1 << ": {";
      for(int i = 0; i < v.size(); ++i){
    if(v[i] ==  s){
      if(first) {
        cout << p[i];
        first = false;
      }
      else cout << "," << p[i];
    }
      }
      cout << "}" << endl;
  }
  cout << endl;
}


void combinations(VI& variables, int num_words, int subsets, int word_act, VS& paraules){
  if(word_act >= num_words) {
    escriuv(variables, paraules, subsets);
    return;
  }
  for(int i = 0; i < subsets; ++i){
    variables[word_act] = i;
    combinations(variables, num_words, subsets, word_act+1, paraules);
  }
}

int main() {

  int words;
  cin >> words;
  VS paraules(words);
  for(int i = 0; i < words; ++i)
    cin >> paraules[i];
  int subsets;
  cin >> subsets;
  VI variables(words);
  combinations(variables, words, subsets, 0, paraules);
}