[SWEA][JAVA] 1234 비밀번호

https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AV14_DEKAJcCFAYD 

SW Expert Academy

문제가 참 예쁘다

번호가 비밀번호 1234네 ㅎ

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.*;

//https://swexpertacademy.com/main/code/problem/problemDetail.do?contestProbId=AV14_DEKAJcCFAYD
public class Solution{
    static int N;
    static int Rkey;
    static List<String> list;

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

        for (int tc = 1; tc <= 10; tc++) {
            StringTokenizer st = new StringTokenizer(br.readLine());
            N = Integer.parseInt(st.nextToken());
            list=new LinkedList<>();
            String line=st.nextToken();
            for (int i = 0; i < line.length(); i++) {
                list.add(line.substring(i,i+1));
            }
            Rkey =1;
            while(true){
                if(Rkey >list.size()-1) break;
                if (Rkey>0&&list.get(Rkey).equals(list.get(Rkey -1))) {
                    list.remove(Rkey);
                    list.remove(Rkey-1);
                    Rkey--;
                }else{
                    Rkey++;
                }
            }
            System.out.print("#"+tc+" ");
            for(String s:list){
                System.out.print(s);
            }
            System.out.println();

        }
    }

}