[백준][Java] 5430번 AC (String, Deque)

 

틀렸습니다 나왔음 반례

1

RR

0

[]

 

출력 : ]

 

if(sBuilder.charAt(sBuilder.length()-1)==',') {

                sBuilder.setLength(sBuilder.length()-1);

}

 

로 고쳐줌.. 마지막 숫자 쉼표 떼주기였는데 element가 없을 때 대괄호 []에서 앞에 대괄호를 떼버리는듯

 

 

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.Deque;
import java.util.LinkedList;
import java.util.StringTokenizer;
 
 
public class Main {
        
    private static BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    private static BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
    
    
    public static void main(String[] args) throws IOException{
        int T = Integer.parseInt(br.readLine());
        StringBuilder sBuilder = new StringBuilder();
        
        Loop1:
        for(int i=0; i<T; i++) {
            
            String functions = br.readLine();
            int n = Integer.parseInt(br.readLine());
            String numArr = br.readLine().replaceAll("[ \\[|\\] ]","");
            
            StringTokenizer stk = new StringTokenizer(numArr,",");
            
            Deque<Integer> deque = new LinkedList<Integer>();
            boolean reverse = false;
            while(stk.hasMoreTokens()) {
                deque.add(Integer.parseInt(stk.nextToken()));
            }
            
            for(int j=0; j<functions.length(); j++) {
                if(functions.charAt(j)=='R') reverse = !reverse;
                else if(functions.charAt(j)=='D') {
                    if(deque.size()<=0) {
                        sBuilder.append("error\n");
                        continue Loop1;
                    }
                    else if(reverse) deque.pollLast();
                    else deque.pollFirst();
                }
            }
            
            sBuilder.append("[");
            while(deque.size()>0) {
                if(reverse) sBuilder.append(deque.pollLast()+",");
                else sBuilder.append(deque.pollFirst()+",");
            }
            if(sBuilder.charAt(sBuilder.length()-1)==',') {
                sBuilder.setLength(sBuilder.length()-1);
            }
            
            sBuilder.append("]\n");
        }
        
        
        bw.write(sBuilder.toString()); 
        bw.flush(); 
        bw.close();
    }
}