1181번 - 단어 정렬

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int N = Integer.parseInt(br.readLine());

		List<String> list = new ArrayList<>();
		for (int i = 0; i < N; i++) {
			list.add(br.readLine());
		}

		list.stream().sorted(Comparator.comparing(String::length)
				.thenComparing(String::compareTo)).distinct()
				.forEach(System.out::println);

	}
}