docs: def find_n75(contig_lengths_dict, genome_length_dict):
      """
      Calculate the N75 for each strain. N75 is defined as the largest contig such that at least 3/4 of the total
      genome size is contained in contigs equal to or larger than this contig
      :param contig_lengths_dict: dictionary of strain name: reverse-sorted list of all contig lengths
      :param genome_length_dict: dictionary of strain name: total genome length
      :return: n75_dict: dictionary of strain name: N75
      """
      # Initialise the dictionary
      n75_dict = dict()
      for file_name, contig_lengths in contig_lengths_dict.items():
          currentlength = 0
          for contig_length in contig_lengths:
              currentlength += contig_length
              # If the current length is now greater than the 3/4 of the total genome length, the current contig length
              # is the N75
              if currentlength >= genome_length_dict[file_name] * 0.75:
                  n75_dict[file_name] = contig_length
                  break
      return n75_dict