new_contents: from collections import deque, defaultdict, namedtuple
  from math import log, sqrt, floor, ceil, pi, e
  import datetime, time
  import re, sys, os
  import random
  
  try:
      from math import log2
  except ImportError:
      def log2(x):
          return log(x, 2)
  
  try:
      from math import inf
  except ImportError:
      inf = float('inf')
  
  try:
      import numpy as np
  except ImportError:
      pass
  
  try:
      import pandas as pd
  except ImportError:
      pass
  
  try:
      import tensorflow as tf
  except ImportError:
      pass
  
  
subject: add import script