CodeFights is more like a play environment like CodingGame, I am yet to find a company that requires me to write the algorithm for a robot in order to demonstra

CodeFights is more like a play environment like CodingGame, I am yet to find a company that requires me to write the algorithm for a robot in order to demonstrate my programming skills. This is why I prefer LeetCode and HackerRank, not because they are better but because they are what companies are using to interview people. CodingGame has a Machine Learning exercise so it is not like the other websites are not innovating, it is just personal preferences.