문제 코드 for (int i = 0; i < phoneBook.length - 1; i++) { for (int j = i + 1; j < phoneBook.length; j++) { if (phoneBook[i].startsWith(phoneBook[j])) { return false; } if (phoneBook[j].startsWith(phoneBook[i])) { return false; } } } return true; } 재도전 public boolean solution(String[] phoneBook) { Arrays.sort(phoneBook); for (int i = 0; i < phoneBook.length - 1; i++) { if (phoneBook[i + 1].startsWit..