88 lines
2.5 KiB
Python
Executable file
88 lines
2.5 KiB
Python
Executable file
#!/usr/bin/env python3
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import sys
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import requests
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from bs4 import BeautifulSoup
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def parse_problem_url(problem_input: str) -> str | None:
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if problem_input.startswith("https://cses.fi/problemset/task/"):
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return problem_input
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elif problem_input.isdigit():
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return f"https://cses.fi/problemset/task/{problem_input}"
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return None
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def scrape(url: str) -> list[tuple[str, str]]:
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try:
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headers = {
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"User-Agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
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}
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response = requests.get(url, headers=headers, timeout=10)
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response.raise_for_status()
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soup = BeautifulSoup(response.text, "html.parser")
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tests = []
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example_header = soup.find("h1", string="Example")
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if example_header:
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current = example_header.find_next_sibling()
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input_text = None
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output_text = None
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while current:
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if current.name == "p" and "Input:" in current.get_text():
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input_pre = current.find_next_sibling("pre")
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if input_pre:
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input_text = input_pre.get_text().strip()
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elif current.name == "p" and "Output:" in current.get_text():
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output_pre = current.find_next_sibling("pre")
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if output_pre:
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output_text = output_pre.get_text().strip()
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break
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current = current.find_next_sibling()
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if input_text and output_text:
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tests.append((input_text, output_text))
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return tests
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except Exception as e:
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print(f"Error scraping CSES: {e}", file=sys.stderr)
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return []
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def main():
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if len(sys.argv) != 2:
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print("Usage: cses.py <problem_id_or_url>", file=sys.stderr)
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sys.exit(1)
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problem_input = sys.argv[1]
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url = parse_problem_url(problem_input)
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if not url:
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print(f"Invalid problem input: {problem_input}", file=sys.stderr)
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print("Use either problem ID (e.g., 1068) or full URL", file=sys.stderr)
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sys.exit(1)
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tests = scrape(url)
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if not tests:
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print(f"No tests found for {problem_input}", file=sys.stderr)
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sys.exit(1)
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print("---INPUT---")
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print(len(tests))
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for input_data, output_data in tests:
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print(input_data)
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print("---OUTPUT---")
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for input_data, output_data in tests:
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print(output_data)
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print("---END---")
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if __name__ == "__main__":
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main()
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