#ifndef S0030_SUBSTRING_WITH_CONCATENATION_OF_ALL_WORDS
#define S0030_SUBSTRING_WITH_CONCATENATION_OF_ALL_WORDS

#include <vector>
#include <string>
#include <unordered_map>

using namespace std;

class Solution {
 public:
  vector<int> findSubstring(string s, vector<string>& words);
};

#endif