old_contents: STOPSTALK_ADMIN_USER_IDS = [1]
  JSON_DUMP_SEPARATORS = (",", ":")
  
  INFLUX_DBNAME = "stopstalk_influxdb"
  INFLUX_RETENTION_POLICY = "quarter"
  
  INFLUX_MEASUREMENT_SCHEMAS = {
      "retrieval_stats": {
          "fields": ["value"],
          "tags": ["app_name", "host", "kind", "stopstalk_handle", "retrieval_type", "site"]
      },
      "crawling_response_times": {
          "fields": ["value"],
          "tags": ["app_name", "host", "site", "kind"]
      }
  }
  
  CODEFORCES_PROBLEM_SETTERS_KEY = "codeforces_problem_setters"
  
  GLOBALLY_TRENDING_PROBLEMS_CACHE_KEY = "global_trending_table_cache"
  
  ONE_HOUR = 1 * 60 * 60
  
  CARD_CACHE_REDIS_KEYS = {
      "add_more_friends_prefix": "cards::add_more_friends_cache_",
      "job_profile_prefix": "cards::job_profile_cache_",
      "upcoming_contests": "cards::upcoming_contests",
      "recent_submissions_prefix": "cards::recent_submissions_cache_",
      "more_accounts_prefix": "cards::more_accounts_cache_",
      "last_solved_problem_prefix": "cards::last_solved_problem_cache_",
      "trending_problems": "cards::trending_problems",
      "search_by_tag": "cards::search_by_tag",
      "curr_streak_prefix": "cards::streak_cache_"
  }
  
  CONTESTS_CACHE_KEY = "upcoming_contests_cache"
  GLOBAL_LEADERBOARD_CACHE_KEY = "global_leaderboard_cache"
  
  CONTESTS_SITE_MAPPING = {"CODECHEF": "CodeChef",
                           "CODEFORCES": "Codeforces",
                           "HACKERRANK": "HackerRank",
                           "HACKEREARTH": "HackerEarth"}
  
  COMMON_USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36"
  
  # Constants to be used in case of request failures
  SERVER_FAILURE = "SERVER_FAILURE"
  NOT_FOUND = "NOT_FOUND"
  OTHER_FAILURE = "OTHER_FAILURE"
  
  REQUEST_FAILURES = (SERVER_FAILURE, NOT_FOUND, OTHER_FAILURE)
  
  VIEW_ONLY_SUBMISSION_SITES = ["HackerEarth"]
  
  # Constants for recommendations
  PAST_PROBLEM_COUNT = 10
  DIFFICULTY_RANGE = 0.5
  RECOMMENDATION_COUNT = 10
  RECOMMENDATION_REFRESH_INTERVAL = 7
  
  RECOMMENDATION_STATUS = {
      "RECOMMENDED": 0,
      "VIEWED": 1,
      "ATTEMPTED": 2,
      "SOLVED": 3
  }
  
new_contents: STOPSTALK_ADMIN_USER_IDS = [1]
  JSON_DUMP_SEPARATORS = (",", ":")
  
  INFLUX_DBNAME = "stopstalk_influxdb"
  INFLUX_RETENTION_POLICY = "quarter"
  
  INFLUX_MEASUREMENT_SCHEMAS = {
      "retrieval_stats": {
          "fields": ["value"],
          "tags": ["app_name", "host", "kind", "stopstalk_handle", "retrieval_type", "site"]
      },
      "crawling_response_times": {
          "fields": ["value"],
          "tags": ["app_name", "host", "site", "kind"]
      }
  }
  
  CODEFORCES_PROBLEM_SETTERS_KEY = "codeforces_problem_setters"
  
  GLOBALLY_TRENDING_PROBLEMS_CACHE_KEY = "global_trending_table_cache"
  
  ONE_HOUR = 1 * 60 * 60
  
  CARD_CACHE_REDIS_KEYS = {
      "add_more_friends_prefix": "cards::add_more_friends_cache_",
      "job_profile_prefix": "cards::job_profile_cache_",
      "upcoming_contests": "cards::upcoming_contests",
      "recent_submissions_prefix": "cards::recent_submissions_cache_",
      "more_accounts_prefix": "cards::more_accounts_cache_",
      "last_solved_problem_prefix": "cards::last_solved_problem_cache_",
      "trending_problems": "cards::trending_problems",
      "search_by_tag": "cards::search_by_tag",
      "curr_streak_prefix": "cards::streak_cache_"
  }
  
  CONTESTS_CACHE_KEY = "upcoming_contests_cache"
  GLOBAL_LEADERBOARD_CACHE_KEY = "global_leaderboard_cache"
  
  CONTESTS_SITE_MAPPING = {"CODECHEF": "CodeChef",
                           "CODEFORCES": "Codeforces",
                           "HACKERRANK": "HackerRank",
                           "HACKEREARTH": "HackerEarth"}
  
  COMMON_USER_AGENT = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.122 Safari/537.36"
  
  # Constants to be used in case of request failures
  SERVER_FAILURE = "SERVER_FAILURE"
  NOT_FOUND = "NOT_FOUND"
  OTHER_FAILURE = "OTHER_FAILURE"
  
  REQUEST_FAILURES = (SERVER_FAILURE, NOT_FOUND, OTHER_FAILURE)
  
  VIEW_ONLY_SUBMISSION_SITES = ["HackerEarth"]
  
  # Constants for recommendations
  PAST_PROBLEM_COUNT = 20
  DIFFICULTY_RANGE = 0.5
  RECOMMENDATION_COUNT = 10
  RECOMMENDATION_REFRESH_INTERVAL = 7
  
  RECOMMENDATION_STATUS = {
      "RECOMMENDED": 0,
      "VIEWED": 1,
      "ATTEMPTED": 2,
      "SOLVED": 3
  }
  
subject: Update past problem count to 20.