code: def find_num_contigs(contig_lengths_dict):
      
      # Initialise the dictionary
      num_contigs_dict = dict()
      for file_name, contig_lengths in contig_lengths_dict.items():
          # Use the len() method to count the number of entries in the list
          num_contigs_dict[file_name] = len(contig_lengths)
      return num_contigs_dict
docs: Count the total number of contigs for each strain
      :param contig_lengths_dict: dictionary of strain name: reverse-sorted list of all contig lengths
      :return: num_contigs_dict: dictionary of strain name: total number of contigs