LeetCode 2254: Design Video Sharing Platform Solution

import java.util.*;

class User {
    private int userId;
    private String username;
    // Other user-related fields and methods

    public User(int userId, String username) {
        this.userId = userId;
        this.username = username;
    }
}

class Video {
    private int videoId;
    private String title;
    // Other video metadata fields and methods

    public Video(int videoId, String title) {
        this.videoId = videoId;
        this.title = title;
    }
}

class VideoPlatform {
    private Map<Integer, User> users;
    private Map<Integer, Video> videos;
    private Map<Integer, Set<Integer>> userUploadedVideos;
    private Map<Integer, Set<Integer>> userViewedVideos;
    // Other data structures and methods for handling video sharing platform functionalities

    public VideoPlatform() {
        users = new HashMap<>();
        videos = new HashMap<>();
        userUploadedVideos = new HashMap<>();
        userViewedVideos = new HashMap<>();
    }

    // Implement methods for user registration, video upload, video viewing, video sharing, etc.
}