[S2] 1406 에디터

java/src/boj1406/Main.java

@@ -0,0 +1,68 @@
+package boj1406;
+
+import java.io.*;
+import java.util.LinkedList;
+import java.util.Stack;
+import java.util.StringTokenizer;
+
+public class Main {
+
+    private static final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+    private static final BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(System.out));
+
+    public static void main(String[] args) throws IOException {
+        Stack<Character> leftStack = new Stack<>();
+        Stack<Character> rightStack = new Stack<>();
+        String init = readLine();
+        for (char c : init.toCharArray()) {
+            leftStack.push(c);
+        }
+
+        int n = Integer.parseInt(readLine());
+
+        for (int i = 0; i < n; i++) {
+            StringTokenizer tokenizer = new StringTokenizer(readLine());
+            String command = tokenizer.nextToken();
+
+            switch (command) {
+                case "L": // 커서를 왼쪽으로 이동
+                    if (!leftStack.isEmpty()) {
+                        rightStack.push(leftStack.pop());
+                    }
+                    break;
+                case "D": // 커서를 오른쪽으로 이동
+                    if (!rightStack.isEmpty()) {
+                        leftStack.push(rightStack.pop());
+                    }
+                    break;
+                case "B": // 커서 왼쪽의 문자 삭제
+                    if (!leftStack.isEmpty()) {
+                        leftStack.pop();
+                    }
+                    break;
+                case "P": // 커서 왼쪽에 문자 추가
+                    char toAdd = tokenizer.nextToken().charAt(0);
+                    leftStack.push(toAdd);
+                    break;
+            }
+        }
+
+        while (!leftStack.isEmpty()) {
+            rightStack.push(leftStack.pop());
+        }
+        while (!rightStack.isEmpty()) {
+            writer.write(rightStack.pop());
+        }
+
+        writer.flush();
+        writer.close();
+    }
+
+    private static String readLine() {
+        try {
+            return reader.readLine();
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}