알고리즘 입문(Java) - String - 4.단어뒤집기

 

 

 

풀이1.

import java.util.*;
class Main {
    public ArrayList<String> solution(int n, String[] str){
        ArrayList<String> answer=new ArrayList<>();
        for(String x : str){
            String tmp=new StringBuilder(x).reverse().toString();
            answer.add(tmp);
        }
        return answer;
    }

    public static void main(String[] args){
        Main T = new Main();
        Scanner kb = new Scanner(System.in);
        int n=kb.nextInt();
        String[] str=new String[n];
        for(int i=0; i<n; i++){
            str[i]=kb.next();
        }
        for(String x : T.solution(n, str)){
            System.out.println(x);
        }
    }
}

 

 

 

풀이2.

import java.util.*;
class Main {
    public ArrayList<String> solution(int n, String[] str){
        ArrayList<String> answer=new ArrayList<>();
        for(String x : str){
            char[] s=x.toCharArray();
            int lt=0, rt=x.length()-1;
            while(lt<rt){
                char tmp=s[lt];
                s[lt]=s[rt];
                s[rt]=tmp;
                lt++;
                rt--;
            }
            String tmp=String.valueOf(s);
            answer.add(tmp);
        }
        return answer;
    }

    public static void main(String[] args){
        Main T = new Main();
        Scanner kb = new Scanner(System.in);
        int n=kb.nextInt();
        String[] str=new String[n];
        for(int i=0; i<n; i++){
            str[i]=kb.next();
        }
        for(String x : T.solution(n, str)){
            System.out.println(x);
        }
    }
}