[BOJ] 백준 1181번: 단어 정렬 (Java)

문제링크

https://www.acmicpc.net/problem/1181

1181번: 단어 정렬

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나의코드

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.Comparator;

public class Main{
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int num = Integer.parseInt(br.readLine());
        
        String[] arr = new String[num];
        
        for(int i = 0; i < num; i++){
            arr[i] = br.readLine();
        }
        
        Arrays.sort(arr, new Comparator<String>(){
            public int compare(String str1, String str2){
                if(str1.length() == str2.length()){
                    return str1.compareTo(str2);
                }else{
                    return str1.length() - str2.length();
                }
            }
        });
        
        StringBuilder sb = new StringBuilder();
        sb.append(arr[0]).append('\n');
        
        for(int i = 1; i < num; i++){
            if(!arr[i].equals(arr[i - 1])){
                sb.append(arr[i]).append('\n');
            }
        }
        System.out.print(sb);
    }
}