diff --git a/.vscode/settings.json b/.vscode/settings.json
index f3caed66..124bd28a 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,6 +1,6 @@
 {
     "editor.formatOnSave": true,
-    "prettier.tabWidth": 2,
+    "prettier.tabWidth": 4,
     "makefile.configureOnOpen": false,
     "prettier.embeddedLanguageFormatting": "auto",
     "prettier.bracketSameLine": false,
diff --git a/docs/md/0001_two_sum.md b/docs/md/0001_two_sum.md
index 976c7158..c1b80838 100644
--- a/docs/md/0001_two_sum.md
+++ b/docs/md/0001_two_sum.md
@@ -1,9 +1,9 @@
 ## 1. Two Sum
 
--  [LeetCode](https://leetcode.com/problems/two-sum/) | [LeetCode CH](https://leetcode.cn/problems/two-sum/) (Easy)
+-   [LeetCode](https://leetcode.com/problems/two-sum/) | [LeetCode CH](https://leetcode.cn/problems/two-sum/) (Easy)
 
 -   Return the indices of the two numbers such that they add up to a specific target.
 
 | Approach | Time Complexity | Space Complexity |
-| -------- | --------------- | ---------------- |
-| Hashmap  | O(n)            | O(n)             |
+| :------: | :-------------: | :--------------: |
+| Hashmap  |      O(n)       |       O(n)       |
diff --git a/utils/integrate.py b/utils/integrate.py
index 2ba3bd99..f84b6fac 100644
--- a/utils/integrate.py
+++ b/utils/integrate.py
@@ -4,66 +4,64 @@
 
 import pandas as pd
 
-from config import code, load_config_yaml
+from config import code, load_config_yaml, sql_code
 
 
 class ProblemList:
     def __init__(self, file: str):
         self.src = "src"
         self.docs = "docs"
-        self.data = load_config_yaml(os.path.join(self.src, "config", file))
-        self.dir = os.path.join(self.docs, self.data.dir)
+        self.df = pd.read_parquet(os.path.join("utils", "questions.parquet"))
+        self.cfg = load_config_yaml(os.path.join(self.src, "config", file))
+        self.dir = os.path.join(self.docs, self.cfg.dir)
         os.makedirs(self.dir, exist_ok=True)
 
-        self.pattern = re.compile(r"^\d{4}_")
-
-        # mkdocs
-        self.tab = 4 * " "
-        self.mkdocs_yaml = f"{self.tab}- {self.data.name}:\n"
-        self.mkdocs_yaml += (
-            f"{self.tab}{self.tab}- Home: {self.data.dir}/index.md\n"
-        )
-
         # index
-        self.index_md_path = os.path.join(self.docs, self.data.dir, "index.md")
+        self.index_md_path = os.path.join(self.docs, self.cfg.dir, "index.md")
         if not os.path.exists(self.index_md_path):
             with open(self.index_md_path, "w") as outfile:
-                outfile.write(f"# {self.data.name}\n")
+                outfile.write(f"# {self.cfg.name}\n")
 
-        for topic, problems in self.data.topics.items():
-            self.generate_topic_markdown(topic, problems)
+        self.pattern = re.compile(r"^\d{4}_")
 
-        print(self.mkdocs_yaml)
+        # mkdocs
+        self.mkdocs_yaml = f"- {self.cfg.name}:\n"
+        self.mkdocs_yaml += f"  - Home: {self.cfg.dir}/index.md\n"
 
-    def generate_topic_markdown(self, topic: str, problems, comments=True):
-        files = [
-            file
-            for problem in problems
-            for file in os.listdir(self.src)
-            if file.endswith(".py")
-            and self.pattern.match(file)
-            and int(file.split("_")[0]) == problem
-        ]
+        for topic, problems in self.cfg.topics.items():
+            self.generate_topic_markdown(topic, problems)
 
+    def generate_topic_markdown(self, topic: str, problems, comments=True):
         title = f"# {topic}\n\n"
         md_name = topic.lower().replace(" ", "_") + ".md"
-        md_path = os.path.join(self.docs, self.data.dir, md_name)
+        md_path = os.path.join(self.docs, self.cfg.dir, md_name)
 
-        self.mkdocs_yaml += (
-            f"{self.tab}{self.tab}- {topic}: {self.data.dir}/{md_name}\n"
-        )
+        self.mkdocs_yaml += f"  - {topic}: {self.cfg.dir}/{md_name}\n"
 
         with open(md_path, "w") as outfile:
             outfile.write(f"---\ncomments: {comments}\n---\n\n")
             outfile.write(title)
 
-            for file in files:
-                filename = file.split(".")[0]
-                md_file_path = os.path.join("docs", "md", filename + ".md")
-                with open(md_file_path, "r") as infile:
-                    data = infile.read()
-
-                outfile.write(data + code(filename) + "\n")
+            for qid in problems:
+                content = self.problem_markdown(qid)
+                outfile.write(content)
+
+    def problem_markdown(self, qid: int):
+        row = self.df[self.df.QID == qid]
+        name = row["titleSlug"].values[0]
+        basename = str(qid).zfill(4) + "_" + name
+        filename = os.path.join(self.dir, basename + ".md")
+
+        if os.path.exists(filename):
+            with open(filename, "r") as infile:
+                content = infile.read()
+                content += code(basename) + "\n"
+        else:
+            content = row["markdown"].values[0]
+            with open(filename, "w") as f:
+                f.write(content + "\n")
+
+        return content
 
 
 if __name__ == "__main__":