#include <string>
#include <vector>
#include <list>
#include <cmath>
#include <algorithm>
#include <map>
#include <set>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class PingPongQueue {
  public:
    vector <int> whoPlaysNext(vector <int> skills, int N, int K);
};

vector <int> PingPongQueue::whoPlaysNext(vector <int> skills, int N, int K)
{
  vector <int> rv;

   return rv;
}