diff --git a/scrapers/atcoder.py b/scrapers/atcoder.py
index 031208e..01c25b0 100644
--- a/scrapers/atcoder.py
+++ b/scrapers/atcoder.py
@@ -42,13 +42,12 @@ def scrape_contest_problems(contest_id: str):
                     # Extract problem letter from task name or URL
                     task_id = task_href.split("/")[-1] if task_href else ""
                     if task_id.startswith(contest_id + "_"):
-                        problem_letter = task_id[len(contest_id) + 1:]
+                        problem_letter = task_id[len(contest_id) + 1 :]
 
                         if problem_letter and task_name:
-                            problems.append({
-                                "id": problem_letter.lower(),
-                                "name": task_name
-                            })
+                            problems.append(
+                                {"id": problem_letter.lower(), "name": task_name}
+                            )
 
         problems.sort(key=lambda x: x["id"])
         return problems
@@ -174,7 +173,9 @@ def main():
 
         if test_cases:
             combined_input = (
-                str(len(test_cases)) + "\n" + "\n".join(tc["input"] for tc in test_cases)
+                str(len(test_cases))
+                + "\n"
+                + "\n".join(tc["input"] for tc in test_cases)
             )
             combined_output = "\n".join(tc["output"] for tc in test_cases)
             test_cases = [{"input": combined_input, "output": combined_output}]
diff --git a/scrapers/codeforces.py b/scrapers/codeforces.py
index 170dacc..83034b7 100644
--- a/scrapers/codeforces.py
+++ b/scrapers/codeforces.py
@@ -70,7 +70,9 @@ def scrape_contest_problems(contest_id: str):
         soup = BeautifulSoup(response.text, "html.parser")
         problems = []
 
-        problem_links = soup.find_all("a", href=lambda x: x and f"/contest/{contest_id}/problem/" in x)
+        problem_links = soup.find_all(
+            "a", href=lambda x: x and f"/contest/{contest_id}/problem/" in x
+        )
 
         for link in problem_links:
             href = link.get("href", "")
@@ -79,10 +81,7 @@ def scrape_contest_problems(contest_id: str):
                 problem_name = link.get_text(strip=True)
 
                 if problem_letter and problem_name and len(problem_letter) == 1:
-                    problems.append({
-                        "id": problem_letter,
-                        "name": problem_name
-                    })
+                    problems.append({"id": problem_letter, "name": problem_name})
 
         problems.sort(key=lambda x: x["id"])
 
diff --git a/scrapers/cses.py b/scrapers/cses.py
index 4cd583f..05bda57 100755
--- a/scrapers/cses.py
+++ b/scrapers/cses.py
@@ -29,7 +29,9 @@ def scrape_all_problems():
         all_categories = {}
 
         # Find all problem links first
-        problem_links = soup.find_all("a", href=lambda x: x and "/problemset/task/" in x)
+        problem_links = soup.find_all(
+            "a", href=lambda x: x and "/problemset/task/" in x
+        )
         print(f"Found {len(problem_links)} problem links", file=sys.stderr)
 
         # Group by categories - look for h1 elements that precede problem lists
@@ -45,10 +47,9 @@ def scrape_all_problems():
                 problem_name = element.get_text(strip=True)
 
                 if problem_id.isdigit() and problem_name and current_category:
-                    all_categories[current_category].append({
-                        "id": problem_id,
-                        "name": problem_name
-                    })
+                    all_categories[current_category].append(
+                        {"id": problem_id, "name": problem_name}
+                    )
 
         # Sort problems in each category
         for category in all_categories: