[백준] 단어 정렬

문제

n = int(input())

word_dict = {}
for i in range(n):
    word = input()
    length = len(word)
    if length not in word_dict.keys():
        word_dict[length] = [word]
    else:
        word_dict[length].append(word)

for key in sorted(word_dict.keys()):
    for word in sorted(set(word_dict[key])):
        print(word)

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