[NP] Movie Collection

import java.util.*;
import java.util.Arrays;
import java.util.List;
import java.util.*;
import java.util.stream.Collectors;

class MoviesList {
    List<Movie> movies;

    public MoviesList() {
        this.movies = new ArrayList<>();
    }

    public void addMovie(String title, int[] ratings) {
        movies.add(new Movie(title, ratings));
    }

    public List<Movie> top10ByAvgRating() {
        return movies.stream()
                .sorted(Comparator.comparing(Movie::getAverageRating).reversed()
                        .thenComparing(Movie::getTitle))
                .limit(10)
                .collect(Collectors.toList());
    }

    private double getMovieCoef(Movie m, int max_ratings_count){
        return m.getAverageRating()*m.getRatings().length/max_ratings_count;
    }

    public List<Movie> top10ByRatingCoef() {
        int max_ratings_count= movies.stream().map(i->i.getRatings().length).max(Integer::max).get();
        Comparator<Movie> comparator= Comparator.comparing((Movie m)->getMovieCoef(m,max_ratings_count)).reversed()
                .thenComparing((Movie m)->m.getTitle());
        return movies.stream().sorted(comparator)
                .limit(10)
                .collect(Collectors.toList());

    }
}

class Movie {

    String title;
    int[] ratings;

    public Movie(String title, int[] ratings) {
        this.title = title;
        this.ratings = ratings;
    }

    public String getTitle() {
        return title;
    }

    public int[] getRatings() {
        return ratings;
    }

    public double getAverageRating() {
        return Arrays.stream(ratings).mapToDouble(i -> i).average().orElse(0);
    }

    @Override
    public String toString() {
        return String.format("%s (%.2f) of %d ratings",title,getAverageRating(),ratings.length);
    }
}
public class MoviesTest {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    MoviesList moviesList = new MoviesList();
    int n = scanner.nextInt();
    scanner.nextLine();
    for (int i = 0; i < n; ++i) {
      String title = scanner.nextLine();
      int x = scanner.nextInt();
      int[] ratings = new int[x];
      for (int j = 0; j < x; ++j) {
        ratings[j] = scanner.nextInt();
      }
      scanner.nextLine();
      moviesList.addMovie(title, ratings);
    }
    scanner.close();
    List<Movie> movies = moviesList.top10ByAvgRating();
    System.out.println("=== TOP 10 BY AVERAGE RATING ===");
    for (Movie movie : movies) {
      System.out.println(movie);
    }
    movies = moviesList.top10ByRatingCoef();
    System.out.println("=== TOP 10 BY RATING COEFFICIENT ===");
    for (Movie movie : movies) {
      System.out.println(movie);
    }
  }
}