[SW Expert] 7701번_염라대왕의이름정렬

문제 링크 : https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AWqU0zh6rssDFARG&categoryId=AWqU0zh6rssDFARG&categoryType=CODE

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from operator import itemgetter
for i in range(int(input())):
    books = []
    for j in range(int(input())):
        books.append(input())
    # 같은 이름은 하나만
    books = set(books)
    # 이름의 길이가 짧을수록, 같은 길이면 사전 순으로
    dict_book = []
    for book in books:
        dict_book.append([len(book),book])
    dict_book = sorted(dict_book,key = itemgetter(0,1))
    print("#{0}".format(i+1))
    for db in dict_book:
        print(db[1])