text: from typing import List, Tuple
  from bs4 import BeautifulSoup
  
  import requests
  
  
  def fetch_sample_io(problem_id: int) -> List[Tuple[str, str]]:
      """Fetch sample IO from BOJ website
  
      Parameters
      ----------
      problem_id
          The ID of the problem to get samples from.
  
      Returns
      -------
      List[Tuple[str, str]]
          List of input/output pairs.
      """
      req = requests.get(f"https://www.acmicpc.net/problem/{problem_id}")
      soup = BeautifulSoup(req.text, "html.parser")
      sample_input_tags = soup.find_all(
          "pre", id=lambda x: x != None and x.startswith("sample-input-")
      )
      sample_output_tags = soup.find_all(
          "pre", id=lambda x: x != None and x.startswith("sample-output-")
      )
      sample_inputs = [x.text for x in sorted(sample_input_tags, key=lambda x: x.get("id"))]  # type: ignore
      sample_outputs = [x.text for x in sorted(sample_output_tags, key=lambda x: x.get("id"))]  # type: ignore
      return list(zip(sample_inputs, sample_outputs))
  