c++

I have a hash table that acts like the dictionary, it is called const dictionarySet & wordList. Now instead of " vector& wordList" in this follow code, how to I change the function , in particular " st.insert(wordList[i]);", into const dictionarySet & wordList. One of the function in my dictionarySet hash table is find (which is finding whether the string is in my hash table) and also insert which is adding the string into the hash table by counting the hash value etc. How would I change the code below? Also, does unordered_set and set work the same way? Because I can't use undordered_set but I can use set. Thanks!

int ladderLength(string beginWord, string endWord, vector& wordList) { //Storing all the words in dictionary to the set for fast lookup unordered_setst; for(int i=0;i)