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

class BuyingFlowers {
  public:
    int buy(vector <int> roses, vector <int> lilies);
};

int BuyingFlowers::buy(vector <int> roses, vector <int> lilies)
{
}