from collections import defaultdict def solution(genres, plays): answer = [] genre_li = [] dict_1 = defaultdict(int) dict_2 = defaultdict(list) dict_3 = defaultdict(list) for i in range(len(genres)) : dict_1[genres[i]] += plays[i] dict_2[(genres[i], plays[i])].append(i) dict_1 = sorted(dict_1.items(), reverse=True, key=lambda item: item[1]) for i in dict_1 : genre_li.append(i[0]) k = list(dict_2..