#ifndef S0015_3SUM_HPP
#define S0015_3SUM_HPP

#include <vector>
#include <unordered_map>
#include <algorithm>

using namespace std;

class S0015 {
 public:
  vector<vector<int>> threeSum1(vector<int>& nums);
  vector<vector<int>> threeSum2(vector<int>& nums);
};

#endif