docs(docs): add ProblemBadges component, layout slot, and enrich pages with topics/video frontmatter, plus guide placeholders and topic‑landing map.

2026-11-02 21:22:43 +00:00 · 2026-09-28 11:20:41 -04:00
1 parent b035d1ffa0
commit d2888360e2
@@ -1,7 +1,7 @@
 /**
- * Project MDX components, available on every page with no import. Static
- * `.astro` files ship no framework JS (a custom element carries any
- * behaviour); interactive React lives in `islands/` instead.
+ * Project MDX components, available on every page with no import, and layout
+ * slot overrides. Static `.astro` files ship no framework JS (a custom element
+ * carries any behaviour); interactive React lives in `islands/` instead.
 */
 import { defineComponents } from "blume";

@@ -10,4 +10,8 @@ export default defineComponents({
    Carousel: "./components/Carousel.astro",
    CarouselImage: "./components/CarouselImage.astro",
  },
+  layout: {
+    // Problem pages' topic + explanation badges, from `topics:` / `video:` frontmatter.
+    PageHeader: "./components/ProblemBadges.astro",
+  },
 });
@@ -0,0 +1,92 @@
+---
+/**
+ * The `PageHeader` slot: the badge row above a page's title. Blume hands the
+ * slot only the route, so the page's frontmatter is looked up through the
+ * route manifest — the same `getEntry` call Blume's own page template makes.
+ * Pages with none of the keys below (landing pages, the changelog) render
+ * nothing.
+ *
+ * - `topics:` (problem pages, written by `apps/cli/sync.ts`) is LeetCode's own
+ *   topic tags. A tag the campaign teaches (`topic-landings.ts`) links to that
+ *   topic's landing page and reads accent; any other tag links to its guide
+ *   page, `/guides/<slug>` (sync creates one per such tag), and reads neutral.
+ * - `video:` (problem pages, written by `apps/cli/videos.ts`) is the NeetCode
+ *   walkthrough's YouTube id, the red "Explanation" badge at the end of the row.
+ * - `list:` (guide pages, written by sync on create) is the tag's LeetCode
+ *   problem list, an orange "LeetCode list" badge.
+ *
+ * A tag naming two campaign topics (`Depth-First Search` is both Tree DFS and
+ * Graph DFS) links to the page's own topic — its route's first segment — when
+ * that is one of them; otherwise DFS/BFS prefer the tree topic for a problem
+ * LeetCode also tags `Tree` and the graph topic for the rest. A route the site
+ * does not serve (a landing or guide page removed) falls back to LeetCode's
+ * problem list for the tag, so a badge never links to a 404.
+ */
+import { getEntry } from "astro:content";
+import data from "blume:data";
+import Badge from "blume/components/content/Badge.astro";
+import { withBase } from "blume/components/islands/base-path.ts";
+import { TOPIC_LANDINGS } from "../topic-landings.ts";
+
+interface Props {
+  route: string;
+}
+
+interface TopicTag {
+  name: string;
+  slug: string;
+}
+
+const { route } = Astro.props;
+const at = data.routes.find((r: { path: string }) => r.path === route);
+const entry = at ? await getEntry(at.collection, at.entryId) : undefined;
+const tags: TopicTag[] = entry?.data.topics ?? [];
+const video: string | undefined = entry?.data.video;
+const list: string | undefined = entry?.data.list;
+
+const served = new Set(data.routes.map((r: { path: string }) => r.path));
+const own = `/${route.split("/")[1]}`;
+const prefer = tags.some((t) => t.slug === "tree") ? "/tree-" : "/graph-";
+
+const badges = tags.map((tag) => {
+  const landings = (TOPIC_LANDINGS[tag.slug] ?? []).filter((path) => served.has(path));
+  const landing = landings.includes(own) ? own : (landings.find((p) => p.startsWith(prefer)) ?? landings[0]);
+  if (landing) return { name: tag.name, href: withBase(landing), accent: true, external: false };
+  const guide = `/guides/${tag.slug}`;
+  if (served.has(guide)) return { name: tag.name, href: withBase(guide), accent: false, external: false };
+  return { name: tag.name, href: `https://leetcode.com/problem-list/${tag.slug}/`, accent: false, external: true };
+});
+
+const linkClass = "no-underline transition-opacity hover:opacity-80";
+---
+
+{
+  (badges.length > 0 || video || list) && (
+    <div class="not-prose mx-auto mb-4 flex max-w-content flex-wrap gap-1.5">
+      {badges.map((b) => (
+        <a
+          href={b.href}
+          target={b.external ? "_blank" : undefined}
+          rel={b.external ? "noopener" : undefined}
+          class={linkClass}
+        >
+          <Badge variant={b.accent ? "accent" : "default"}>{b.name}</Badge>
+        </a>
+      ))}
+      {video && (
+        <a href={`https://www.youtube.com/watch?v=${video}`} target="_blank" rel="noopener" class={linkClass}>
+          <Badge variant="danger" icon="youtube">
+            Explanation
+          </Badge>
+        </a>
+      )}
+      {list && (
+        <a href={list} target="_blank" rel="noopener" class={linkClass}>
+          <Badge variant="warning" icon="list">
+            LeetCode list
+          </Badge>
+        </a>
+      )}
+    </div>
+  )
+}
@@ -2,13 +2,15 @@
 title: '153. Find Minimum in Rotated Sorted Array'
 description: 'Suppose an array of length n sorted in ascending order is rotated between 1 and n times. For example, the array nums = [0,1,2,4,5,6,7] might become:'
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "nIVW4P8b1VA"
 sidebar:
  label: 'Find Minimum in Rotated Sorted Array'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Notice that rotating an array [a[0], a[1], a[2], ..., a[n-1]] 1 time results in the array [a[n-1], a[0], a[1], a[2], ..., a[n-2]].
 ::::
@@ -69,7 +71,3 @@ class Solution:

        return nums[lowest_index]
 ```
-
-## Explanation
-
-<YouTube id="nIVW4P8b1VA" title="Find Minimum in Rotated Sorted Array - Binary Search - Leetcode 153 - Python" />
@@ -2,13 +2,15 @@
 title: '33. Search in Rotated Sorted Array'
 description: There is an integer array nums sorted in ascending order (with distinct values)
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "U8XENwh8Oy8"
 sidebar:
  label: 'Search in Rotated Sorted Array'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must write an algorithm with O(log n) runtime complexity.
 ::::
@@ -93,7 +95,3 @@ var search = function(nums, target) {
  return -1;
 };
 ```
-
-## Explanation
-
-<YouTube id="U8XENwh8Oy8" title="Search in rotated sorted array - Leetcode 33 - Python" />
@@ -2,13 +2,15 @@
 title: '35. Search Insert Position'
 description: Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "K-RYzDZkzCI"
 sidebar:
  label: 'Search Insert Position'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must write an algorithm with O(log n) runtime complexity.
 ::::
@@ -66,7 +68,3 @@ class Solution:

        return (l + r) // 2 + 1
 ```
-
-## Explanation
-
-<YouTube id="K-RYzDZkzCI" title="Search Insert Position - Binary Search - Leetcode 35 - Python" />
@@ -2,13 +2,15 @@
 title: '704. Binary Search'
 description: Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If target exists, then return its index. Otherwise, return -1
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "s4DPM8ct1pI"
 sidebar:
  label: 'Binary Search'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must write an algorithm with O(log n) runtime complexity.
 ::::
@@ -71,7 +73,3 @@ var search = function(nums, target) {
    return -1;
 };
 ```
-
-## Explanation
-
-<YouTube id="s4DPM8ct1pI" title="Binary Search - Leetcode 704 - Python" />
@@ -2,13 +2,16 @@
 title: '74. Search a 2D Matrix'
 description: 'You are given an m x n integer matrix matrix with the following two properties:'
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+  - { name: "Matrix", slug: "matrix" }
+video: "Ber2pi2C0j0"
 sidebar:
  label: 'Search a 2D Matrix'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must write a solution in O(log(m * n)) time complexity.
 ::::
@@ -86,7 +89,3 @@ class Solution:
                return True
        return False
 ```
-
-## Explanation
-
-<YouTube id="Ber2pi2C0j0" title="Search a 2D Matrix - Leetcode 74 - Python" />
@@ -2,13 +2,15 @@
 title: '875. Koko Eating Bananas'
 description: Koko loves to eat bananas. There are n piles of bananas, the i^th pile has piles[i] bananas. The guards have gone and will come back in h hours
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "U2SozAs9RzA"
 sidebar:
  label: 'Koko Eating Bananas'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `piles = [3,6,7,11], h = 8`
 - Output: `4`
@@ -77,7 +79,3 @@ var minEatingSpeed = function(piles, h) {
  return l;
 };
 ```
-
-## Explanation
-
-<YouTube id="U2SozAs9RzA" title="Koko Eating Bananas - Binary Search - Leetcode 875 - Python" />
@@ -2,13 +2,15 @@
 title: '1. Two Sum'
 description: You are given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+video: "KLlXCFG5TnA"
 sidebar:
  label: 'Two Sum'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Can you come up with an algorithm that is less than O(n^2) time complexity?
 ::::
@@ -60,7 +62,3 @@ class Solution:
            seen[num] = i
        return []
 ```
-
-## Explanation
-
-<YouTube id="KLlXCFG5TnA" title="Two Sum - Leetcode 1 - HashMap - Python" />
@@ -2,13 +2,14 @@
 title: '1832. Check if the Sentence Is Pangram'
 description: A pangram is a sentence where every letter of the English alphabet appears at least once
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
 sidebar:
  label: 'Check if the Sentence Is Pangram'
  badge: 'Easy'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `sentence = "thequickbrownfoxjumpsoverthelazydog"`
 - Output: `true`
@@ -2,13 +2,16 @@
 title: '217. Contains Duplicate'
 description: Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Sorting", slug: "sorting" }
+video: "3OamzN90kPg"
 sidebar:
  label: 'Contains Duplicate'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [1,2,3,1]`
 - Output: `true`
@@ -48,7 +51,3 @@ class Solution:
    def containsDuplicate(self, nums: List[int]) -> bool:
        return len(set(nums)) != len(nums)
 ```
-
-## Explanation
-
-<YouTube id="3OamzN90kPg" title="Contains Duplicate - Leetcode 217 - Python" />
@@ -2,13 +2,16 @@
 title: '242. Valid Anagram'
 description: Given two strings s and t, return true if t is an anagram of s, and false otherwise
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Sorting", slug: "sorting" }
+video: "9UtInBqnCgA"
 sidebar:
  label: 'Valid Anagram'
  badge: 'Easy'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ::::warning
 What if the inputs contain Unicode characters? How would you adapt your solution to such a case?
 ::::
@@ -60,7 +63,3 @@ var isAnagram = function(s, t) {
  return true;
 };
 ```
-
-## Explanation
-
-<YouTube id="9UtInBqnCgA" title="Valid Anagram - Leetcode 242 - Python" />
@@ -2,13 +2,21 @@
 title: '347. Top K Frequent Elements'
 description: Given an integer array nums and an integer k, return the k most frequent elements. You may return the answer in any order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Divide and Conquer", slug: "divide-and-conquer" }
+  - { name: "Sorting", slug: "sorting" }
+  - { name: "Heap (Priority Queue)", slug: "heap-priority-queue" }
+  - { name: "Bucket Sort", slug: "bucket-sort" }
+  - { name: "Counting", slug: "counting" }
+  - { name: "Quickselect", slug: "quickselect" }
+video: "YPTqKIgVk-k"
 sidebar:
  label: 'Top K Frequent Elements'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Your algorithm's time complexity must be better than O(n log n), where n is the array's size.
 ::::
@@ -60,7 +68,3 @@ var topKFrequent = function (nums, k) {
    .slice(0, k);
 };
 ```
-
-## Explanation
-
-<YouTube id="YPTqKIgVk-k" title="Top K Frequent Elements - Bucket Sort - Leetcode 347 - Python" />
@@ -2,13 +2,17 @@
 title: '387. First Unique Character in a String'
 description: Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Queue", slug: "queue" }
+  - { name: "Counting", slug: "counting" }
+video: "rBENYgWy3xU"
 sidebar:
  label: 'First Unique Character in a String'
  badge: 'Easy'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `s = "leetcode"`
 - Output: `0`
@@ -58,7 +62,3 @@ var firstUniqChar = function (s) {
  return -1;
 };
 ```
-
-## Explanation
-
-<YouTube id="rBENYgWy3xU" title="First Unique Character in a String - Leetcode 387 - Python" />
@@ -2,13 +2,19 @@
 title: '451. Sort Characters By Frequency'
 description: Given a string s, sort it in decreasing order based on the frequency of the characters. The frequency of a character is the number of times it appears in the string
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Sorting", slug: "sorting" }
+  - { name: "Heap (Priority Queue)", slug: "heap-priority-queue" }
+  - { name: "Bucket Sort", slug: "bucket-sort" }
+  - { name: "Counting", slug: "counting" }
+video: "OXdXc9HTrIg"
 sidebar:
  label: 'Sort Characters By Frequency'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `s = "tree"`
 - Output: `"eert"`
@@ -60,7 +66,3 @@ var frequencySort = function (s) {
    .join("");
 };
 ```
-
-## Explanation
-
-<YouTube id="OXdXc9HTrIg" title="Sort Characters By Frequency - Leetcode 451 - Python" />
@@ -2,13 +2,17 @@
 title: '49. Group Anagrams'
 description: Given an array of strings strs, group the anagrams together. You can return the answer in any order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Sorting", slug: "sorting" }
+video: "vzdNOK2oB2E"
 sidebar:
  label: 'Group Anagrams'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `strs = ["eat","tea","tan","ate","nat","bat"]`
 - Output: `[["bat"],["nat","tan"],["ate","eat","tea"]]`
@@ -65,7 +69,3 @@ var groupAnagrams = function(strs) {
  return Object.values(anagrams);
 };
 ```
-
-## Explanation
-
-<YouTube id="vzdNOK2oB2E" title="Group Anagrams - Categorize Strings by Count - Leetcode 49" />
@@ -2,13 +2,16 @@
 title: '739. Daily Temperatures'
 description: Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the i^th day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Stack", slug: "stack" }
+  - { name: "Monotonic Stack", slug: "monotonic-stack" }
+video: "cTBiBSnjO3c"
 sidebar:
  label: 'Daily Temperatures'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `temperatures = [73,74,75,71,69,72,76,73]`
 - Output: `[1,1,4,2,1,1,0,0]`
@@ -54,7 +57,3 @@ class Solution:
            stack.append(i)
        return ans
 ```
-
-## Explanation
-
-<YouTube id="cTBiBSnjO3c" title="Daily Temperatures - Monotonic Stack - Leetcode 739 - Python" />
@@ -2,13 +2,17 @@
 title: '853. Car Fleet'
 description: There are n cars at given miles away from the starting mile 0, traveling to reach the mile target
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Stack", slug: "stack" }
+  - { name: "Sorting", slug: "sorting" }
+  - { name: "Monotonic Stack", slug: "monotonic-stack" }
+video: "Pr6T-3yB9RM"
 sidebar:
  label: 'Car Fleet'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `target = 12, position = [10,8,0,5,3], speed = [2,4,1,1,3]`
 - Output: `3`
@@ -62,7 +66,3 @@ class Solution:

        return len(stack)
 ```
-
-## Explanation
-
-<YouTube id="Pr6T-3yB9RM" title="Car Fleet - Leetcode 853 - Python" />
@@ -2,13 +2,15 @@
 title: '238. Product of Array Except Self'
 description: Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i]
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Prefix Sum", slug: "prefix-sum" }
+video: "bNvIQI2wAjk"
 sidebar:
  label: 'Product of Array Except Self'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must write an algorithm that runs in O(n) time and without using the division operation.
 Can you solve the problem in O(1) extra space complexity? (The output array does not count as extra space for space complexity analysis.)
@@ -63,7 +65,3 @@ var productExceptSelf = function(nums) {
  return answer;
 };
 ```
-
-## Explanation
-
-<YouTube id="bNvIQI2wAjk" title="Product of Array Except Self - Leetcode 238 - Python" />
@@ -2,13 +2,16 @@
 title: '303. Range Sum Query - Immutable'
 description: Given an integer array nums, handle multiple queries of the following type
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Design", slug: "design" }
+  - { name: "Prefix Sum", slug: "prefix-sum" }
+video: "2pndAmo_sMA"
 sidebar:
  label: 'Range Sum Query - Immutable'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `["NumArray", "sumRange", "sumRange", "sumRange"]` `[[[-2, 0, 3, -5, 2, -1]], [0, 2], [2, 5], [0, 5]]`
 - Output: `[null, 1, -1, -3]`
@@ -66,7 +69,3 @@ class NumArray {
 * var param_1 = obj.sumRange(left,right)
 */
 ```
-
-## Explanation
-
-<YouTube id="2pndAmo_sMA" title="Range Sum Query Immutable - Leetcode 303 - Python" />
@@ -2,13 +2,16 @@
 title: '560. Subarray Sum Equals K'
 description: Given an array of integers nums and an integer k, return the total number of subarrays whose sum equals to k
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Prefix Sum", slug: "prefix-sum" }
+video: "fFVZt-6sgyo"
 sidebar:
  label: 'Subarray Sum Equals K'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [1,1,1], k = 2`
 - Output: `2`
@@ -65,7 +68,3 @@ var subarraySum = function(nums, k) {
  return count
 };
 ```
-
-## Explanation
-
-<YouTube id="fFVZt-6sgyo" title="Subarray Sum Equals K - Prefix Sums - Leetcode 560 - Python" />
@@ -2,13 +2,15 @@
 title: '121. Best Time to Buy and Sell Stock'
 description: You are given an array prices where prices[i] is the price of a given stock on the i^th day
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Dynamic Programming", slug: "dynamic-programming" }
+video: "1pkOgXD63yU"
 sidebar:
  label: 'Best Time to Buy and Sell Stock'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `prices = [7,1,5,3,6,4]`
 - Output: `5`
@@ -55,7 +57,3 @@ class Solution:
            ans = max(ans, curr)
        return ans
 ```
-
-## Explanation
-
-<YouTube id="1pkOgXD63yU" title="Sliding Window: Best Time to Buy and Sell Stock - Leetcode 121 - Python" />
@@ -2,13 +2,16 @@
 title: '3. Longest Substring Without Repeating Characters'
 description: Given a string s, find the length of the longest substring without duplicate characters
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Sliding Window", slug: "sliding-window" }
+video: "wiGpQwVHdE0"
 sidebar:
  label: 'Longest Substring Without Repeating Characters'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `s = "abcabcbb"`
 - Output: `3`
@@ -61,7 +64,3 @@ class Solution:

        return ans
 ```
-
-## Explanation
-
-<YouTube id="wiGpQwVHdE0" title="Longest Substring Without Repeating Characters - Leetcode 3 - Python" />
@@ -2,13 +2,16 @@
 title: '424. Longest Repeating Character Replacement'
 description: You are given a string s and an integer k. You can choose any character of the string and change it to any other uppercase English character. You can perform this operation at most k times
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Sliding Window", slug: "sliding-window" }
+video: "gqXU1UyA8pk"
 sidebar:
  label: 'Longest Repeating Character Replacement'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `s = "ABAB", k = 2`
 - Output: `4`
@@ -61,7 +64,3 @@ class Solution:
            res = max(res, r - l + 1)
        return res
 ```
-
-## Explanation
-
-<YouTube id="gqXU1UyA8pk" title="Longest Repeating Character Replacement - Leetcode 424 - Python" />
@@ -2,13 +2,17 @@
 title: '567. Permutation in String'
 description: Given two strings s1 and s2, return true if s2 contains a permutation of s1, or false otherwise
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "String", slug: "string" }
+  - { name: "Sliding Window", slug: "sliding-window" }
+video: "UbyhOgBN834"
 sidebar:
  label: 'Permutation in String'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `s1 = "ab", s2 = "eidbaooo"`
 - Output: `true`
@@ -68,7 +72,3 @@ class Solution:

        return False
 ```
-
-## Explanation
-
-<YouTube id="UbyhOgBN834" title="Permutation in String - Leetcode 567 - Python" />
@@ -2,13 +2,16 @@
 title: '150. Evaluate Reverse Polish Notation'
 description: You are given an array of strings tokens that represents an arithmetic expression in a Reverse Polish Notation
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Math", slug: "math" }
+  - { name: "Stack", slug: "stack" }
+video: "iu0082c4HDE"
 sidebar:
  label: 'Evaluate Reverse Polish Notation'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `tokens = ["2","1","+","3","*"]`
 - Output: `9`
@@ -69,7 +72,3 @@ class Solution:

        return stack[0]
 ```
-
-## Explanation
-
-<YouTube id="iu0082c4HDE" title="Evaluate Reverse Polish Notation - Leetcode 150 - Python" />
@@ -2,13 +2,15 @@
 title: '155. Min Stack'
 description: Design a stack that supports push, pop, top, and retrieving the minimum element in constant time
 icon: dot
+topics:
+  - { name: "Stack", slug: "stack" }
+  - { name: "Design", slug: "design" }
+video: "qkLl7nAwDPo"
 sidebar:
  label: 'Min Stack'
  badge: 'Medium'
 ---

-<Badge variant="accent">Stack</Badge>
-
 ::::warning
 You must implement a solution with O(1) time complexity for each function.
 ::::
@@ -77,7 +79,3 @@ class MinStack:
 # param_3 = obj.top()
 # param_4 = obj.getMin()
 ```
-
-## Explanation
-
-<YouTube id="qkLl7nAwDPo" title="Design Min Stack - Amazon Interview Question - Leetcode 155 - Python" />
@@ -2,13 +2,16 @@
 title: '20. Valid Parentheses'
 description: Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid
 icon: dot
+topics:
+  - { name: "String", slug: "string" }
+  - { name: "Stack", slug: "stack" }
+  - { name: "Bracket Sequences", slug: "bracket-sequences" }
+video: "WTzjTskDFMg"
 sidebar:
  label: 'Valid Parentheses'
  badge: 'Easy'
 ---

-<Badge variant="accent">String</Badge>
-
 ### Example 1:
 - Input: `s = "()"`
 - Output: `true`
@@ -71,7 +74,3 @@ class Solution:

        return True if not stack else False
 ```
-
-## Explanation
-
-<YouTube id="WTzjTskDFMg" title="Valid Parentheses - Stack - Leetcode 20 - Python" />
@@ -2,13 +2,16 @@
 title: '11. Container With Most Water'
 description: You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the i^th line are (i, 0) and (i, height[i])
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "Greedy", slug: "greedy" }
+video: "UuiTKBwPgAo"
 sidebar:
  label: 'Container With Most Water'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Notice that you may not slant the container.
 ::::
@@ -63,7 +66,3 @@ class Solution:

        return res
 ```
-
-## Explanation
-
-<YouTube id="UuiTKBwPgAo" title="Container with Most Water - Leetcode 11 - Python" />
@@ -2,13 +2,15 @@
 title: '125. Valid Palindrome'
 description: A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers
 icon: dot
+topics:
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "String", slug: "string" }
+video: "jJXJ16kPFWg"
 sidebar:
  label: 'Valid Palindrome'
  badge: 'Easy'
 ---

-<Badge variant="accent">Two Pointers</Badge>
-
 ### Example 1:
 - Input: `s = "A man, a plan, a canal: Panama"`
 - Output: `true`
@@ -64,7 +66,3 @@ var isPalindrome = function(s) {
  return true;
 };
 ```
-
-## Explanation
-
-<YouTube id="jJXJ16kPFWg" title="Valid Palindrome - Leetcode 125 - Python" />
@@ -2,13 +2,16 @@
 title: '15. 3Sum'
 description: Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j != k, and nums[i] + nums[j] + nums[k] == 0
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "Sorting", slug: "sorting" }
+video: "jzZsG8n2R9A"
 sidebar:
  label: '3Sum'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Notice that the solution set must not contain duplicate triplets.
 ::::
@@ -99,7 +102,3 @@ class Solution:

        return result
 ```
-
-## Explanation
-
-<YouTube id="jzZsG8n2R9A" title="3Sum - Leetcode 15 - Python" />
@@ -2,13 +2,16 @@
 title: '167. Two Sum II - Input Array Is Sorted'
 description: Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Let these two numbers be numbers[index1] and numbers[index2] where 1 <= index1 < index2 <= numbers.length
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "Binary Search", slug: "binary-search" }
+video: "cQ1Oz4ckceM"
 sidebar:
  label: 'Two Sum II - Input Array Is Sorted'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Your solution must use only constant extra space.
 ::::
@@ -70,7 +73,3 @@ class Solution:
                j-=1
        return []
 ```
-
-## Explanation
-
-<YouTube id="cQ1Oz4ckceM" title="TWO SUM II - Amazon Coding Interview Question - Leetcode 167 - Python" />
@@ -2,13 +2,15 @@
 title: '344. Reverse String'
 description: Write a function that reverses a string. The input string is given as an array of characters s
 icon: dot
+topics:
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "String", slug: "string" }
+video: "_d0T_2Lk2qA"
 sidebar:
  label: 'Reverse String'
  badge: 'Easy'
 ---

-<Badge variant="accent">Two Pointers</Badge>
-
 :::warning
 You must do this by modifying the input array in-place with O(1) extra memory.
 :::
@@ -56,7 +58,3 @@ var reverseString = function(s) {
    }   
 };
 ```
-
-## Explanation
-
-<YouTube id="_d0T_2Lk2qA" title="Reverse String - 3 Ways - Leetcode 344 - Python" />
@@ -2,13 +2,16 @@
 title: '392. Is Subsequence'
 description: Given two strings s and t, return true if s is a subsequence of t, or false otherwise
 icon: dot
+topics:
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "String", slug: "string" }
+  - { name: "Dynamic Programming", slug: "dynamic-programming" }
+video: "99RVfqklbCE"
 sidebar:
  label: 'Is Subsequence'
  badge: 'Easy'
 ---

-<Badge variant="accent">Two Pointers</Badge>
-
 ::::warning
 Suppose there are lots of incoming s, say s1, s2, ..., sk where k >= 10^9, and you want to check one by one to see if t has its subsequence. In this scenario, how would you change your code?
 ::::
@@ -59,7 +62,3 @@ class Solution:

        return i == len(s)
 ```
-
-## Explanation
-
-<YouTube id="99RVfqklbCE" title="Is Subsequence - Leetcode 392" />
@@ -2,13 +2,16 @@
 title: '977. Squares of a Sorted Array'
 description: Given an integer array nums sorted in non-decreasing order, return an array of the squares of each number sorted in non-decreasing order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "Sorting", slug: "sorting" }
+video: "FPCZsG_AkUg"
 sidebar:
  label: 'Squares of a Sorted Array'
  badge: 'Easy'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 Squaring each element and sorting the new array is very trivial, could you find an O(n) solution using a different approach?
 ::::
@@ -69,7 +72,3 @@ var sortedSquares = function(nums) {
  return ans;
 };
 ```
-
-## Explanation
-
-<YouTube id="FPCZsG_AkUg" title="Squares of a Sorted Array - Leetcode 977 - Python" />
@@ -2,13 +2,17 @@
 title: '146. LRU Cache'
 description: Design a data structure that follows the constraints of a Least Recently Used (LRU) cache
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Design", slug: "design" }
+  - { name: "Doubly-Linked List", slug: "doubly-linked-list" }
+video: "7ABFKPK2hD4"
 sidebar:
  label: 'LRU Cache'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: ``
 - Output: ``
@@ -110,7 +114,3 @@ class LRUCache:
 # param_1 = obj.get(key)
 # obj.put(key,value)
 ```
-
-## Explanation
-
-<YouTube id="7ABFKPK2hD4" title="LRU Cache - Twitch Interview Question - Leetcode 146" />
@@ -2,13 +2,16 @@
 title: '2. Add Two Numbers'
 description: You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes contains a single digit. Add the two numbers and return the sum as a linked list
 icon: dot
+topics:
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Math", slug: "math" }
+  - { name: "Recursion", slug: "recursion" }
+video: "wgFPrzTjm7s"
 sidebar:
  label: 'Add Two Numbers'
  badge: 'Medium'
 ---

-<Badge variant="accent">Linked List</Badge>
-
 ### Example 1:
 - Input: `l1 = [2,4,3], l2 = [5,6,4]`
 - Output: `[7,0,8]`
@@ -70,7 +73,3 @@ class Solution:

        return dummy.next
 ```
-
-## Explanation
-
-<YouTube id="wgFPrzTjm7s" title="Add Two Numbers - Leetcode 2 - Python" />
@@ -2,13 +2,17 @@
 title: '141. Linked List Cycle'
 description: Given head, the head of a linked list, determine if the linked list has a cycle in it
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Two Pointers", slug: "two-pointers" }
+  - { name: "Floyd's Cycle Finding Algorithm", slug: "floyds-cycle-finding-algorithm" }
+video: "gBTe7lFR3vc"
 sidebar:
  label: 'Linked List Cycle'
  badge: 'Easy'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ::::warning
 Can you solve it using O(1) (i.e. constant) memory?
 ::::
@@ -69,7 +73,3 @@ class Solution:
                return True
        return False
 ```
-
-## Explanation
-
-<YouTube id="gBTe7lFR3vc" title="Linked List Cycle - Floyd's Tortoise and Hare - Leetcode 141 - Python" />
@@ -2,13 +2,15 @@
 title: '206. Reverse Linked List'
 description: Given the head of a singly linked list, reverse the list, and return the reversed list
 icon: dot
+topics:
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Recursion", slug: "recursion" }
+video: "G0_I-ZF0S38"
 sidebar:
  label: 'Reverse Linked List'
  badge: 'Easy'
 ---

-<Badge variant="accent">Linked List</Badge>
-
 ::::warning
 A linked list can be reversed either iteratively or recursively. Could you implement both?
 ::::
@@ -62,7 +64,3 @@ class Solution:
            curr = next_
        return prev
 ```
-
-## Explanation
-
-<YouTube id="G0_I-ZF0S38" title="Reverse Linked List - Iterative AND Recursive - Leetcode 206 - Python" />
@@ -2,13 +2,15 @@
 title: '21. Merge Two Sorted Lists'
 description: You are given the heads of two sorted linked lists list1 and list2
 icon: dot
+topics:
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Recursion", slug: "recursion" }
+video: "XIdigk956u0"
 sidebar:
  label: 'Merge Two Sorted Lists'
  badge: 'Easy'
 ---

-<Badge variant="accent">Linked List</Badge>
-
 ### Example 1:
 - Input: `list1 = [1,2,4], list2 = [1,3,4]`
 - Output: `[1,1,2,3,4,4]`
@@ -82,7 +84,3 @@ class Solution:
        current.next = list1 or list2
        return head
 ```
-
-## Explanation
-
-<YouTube id="XIdigk956u0" title="Merge Two Sorted Lists - Leetcode 21 - Python" />
@@ -2,13 +2,16 @@
 title: '48. Rotate Image'
 description: You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise)
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Math", slug: "math" }
+  - { name: "Matrix", slug: "matrix" }
+video: "fMSJSS7eO1w"
 sidebar:
  label: 'Rotate Image'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `matrix = [[1,2,3],[4,5,6],[7,8,9]]`
 - Output: `[[7,4,1],[8,5,2],[9,6,3]]`
@@ -52,7 +55,3 @@ class Solution:
        for r in range(n):
            matrix[r].reverse()
 ```
-
-## Explanation
-
-<YouTube id="fMSJSS7eO1w" title="Rotate Image - Matrix - Leetcode 48" />
@@ -2,13 +2,16 @@
 title: '54. Spiral Matrix'
 description: Given an m x n matrix, return all elements of the matrix in spiral order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Matrix", slug: "matrix" }
+  - { name: "Simulation", slug: "simulation" }
+video: "BJnMZNwUk1M"
 sidebar:
  label: 'Spiral Matrix'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `matrix = [[1,2,3],[4,5,6],[7,8,9]]`
 - Output: `[1,2,3,6,9,8,7,4,5]`
@@ -76,7 +79,3 @@ class Solution:

        return res
 ```
-
-## Explanation
-
-<YouTube id="BJnMZNwUk1M" title="Spiral Matrix - Microsoft Interview Question - Leetcode 54" />
@@ -2,13 +2,16 @@
 title: '73. Set Matrix Zeroes'
 description: Given an m x n integer matrix matrix, if an element is 0, set its entire row and column to 0's
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Matrix", slug: "matrix" }
+video: "T41rL0L3Pnw"
 sidebar:
  label: 'Set Matrix Zeroes'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ::::warning
 You must do it in place.
 ::::
@@ -95,7 +98,3 @@ class Solution:
            for r in range(m):
                matrix[r][0] = 0
 ```
-
-## Explanation
-
-<YouTube id="T41rL0L3Pnw" title="Set Matrix Zeroes - In-place - Leetcode 73" />
@@ -2,13 +2,17 @@
 title: '230. Kth Smallest Element in a BST'
 description: Given the root of a binary search tree, and an integer k, return the k^th smallest value (1-indexed) of all the values of the nodes in the tree
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Binary Search Tree", slug: "binary-search-tree" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "5LUXSvjmGCw"
 sidebar:
  label: 'Kth Smallest Element in a BST'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ::::warning
 If the BST is modified often (i.e., we can do insert and delete operations) and you need to find the kth smallest frequently, how would you optimize?
 ::::
@@ -70,7 +74,3 @@ class Solution:
                return cur.val
            cur = cur.right
 ```
-
-## Explanation
-
-<YouTube id="5LUXSvjmGCw" title="Kth Smallest Element in a BST - Leetcode 230 - Python" />
@@ -2,13 +2,19 @@
 title: '235. Lowest Common Ancestor of a Binary Search Tree'
 description: Given a binary search tree (BST), find the lowest common ancestor (LCA) node of two given nodes in the BST
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Binary Search Tree", slug: "binary-search-tree" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+  - { name: "Binary Lifting", slug: "binary-lifting" }
+  - { name: "Lowest Common Ancestor", slug: "lowest-common-ancestor" }
+video: "gs2LMfuOR9k"
 sidebar:
  label: 'Lowest Common Ancestor of a Binary Search Tree'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [6,2,8,0,4,7,9,null,null,3,5], p = 2, q = 8`
 - Output: `6`
@@ -71,7 +77,3 @@ class Solution:
            else:
                return cur
 ```
-
-## Explanation
-
-<YouTube id="gs2LMfuOR9k" title="Lowest Common Ancestor of a Binary Search Tree - Leetcode 235 - Python" />
@@ -2,13 +2,17 @@
 title: '98. Validate Binary Search Tree'
 description: Given the root of a binary tree, determine if it is a valid binary search tree (BST)
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Binary Search Tree", slug: "binary-search-tree" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "s6ATEkipzow"
 sidebar:
  label: 'Validate Binary Search Tree'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [2,1,3]`
 - Output: `true`
@@ -62,7 +66,3 @@ class Solution:

        return valid(root, float("-inf"), float("inf"))
 ```
-
-## Explanation
-
-<YouTube id="s6ATEkipzow" title="Validate Binary Search Tree - Depth First Search - Leetcode 98" />
@@ -2,13 +2,18 @@
 title: '215. Kth Largest Element in an Array'
 description: Given an integer array nums and an integer k, return the k^th largest element in the array
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Divide and Conquer", slug: "divide-and-conquer" }
+  - { name: "Sorting", slug: "sorting" }
+  - { name: "Heap (Priority Queue)", slug: "heap-priority-queue" }
+  - { name: "Quickselect", slug: "quickselect" }
+video: "XEmy13g1Qxc"
 sidebar:
  label: 'Kth Largest Element in an Array'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [3,2,1,5,6,4], k = 2`
 - Output: `5`
@@ -54,7 +59,3 @@ class Solution:

        return -heapq.heappop(nums)
 ```
-
-## Explanation
-
-<YouTube id="XEmy13g1Qxc" title="Kth Largest Element in an Array - Quick Select - Leetcode 215 - Python" />
@@ -2,13 +2,18 @@
 title: '23. Merge k Sorted Lists'
 description: You are given an array of k linked-lists lists, each linked-list is sorted in ascending order
 icon: dot
+topics:
+  - { name: "Linked List", slug: "linked-list" }
+  - { name: "Divide and Conquer", slug: "divide-and-conquer" }
+  - { name: "Heap (Priority Queue)", slug: "heap-priority-queue" }
+  - { name: "Merge Sort", slug: "merge-sort" }
+  - { name: "Tournament Sort", slug: "tournament-sort" }
+video: "q5a5OiGbT6Q"
 sidebar:
  label: 'Merge k Sorted Lists'
  badge: 'Hard'
 ---

-<Badge variant="accent">Linked List</Badge>
-
 ### Example 1:
 - Input: `lists = [[1,4,5],[1,3,4],[2,6]]`
 - Output: `[1,1,2,3,4,4,5,6]`
@@ -89,7 +94,3 @@ class Solution:
        # Space: O(n)
        return D.next
 ```
-
-## Explanation
-
-<YouTube id="q5a5OiGbT6Q" title="Merge K Sorted Lists - Leetcode 23 - Python" />
@@ -2,13 +2,21 @@
 title: '973. K Closest Points to Origin'
 description: Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k, return the k closest points to the origin (0, 0)
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Math", slug: "math" }
+  - { name: "Divide and Conquer", slug: "divide-and-conquer" }
+  - { name: "Geometry", slug: "geometry" }
+  - { name: "Sorting", slug: "sorting" }
+  - { name: "Heap (Priority Queue)", slug: "heap-priority-queue" }
+  - { name: "Quickselect", slug: "quickselect" }
+  - { name: "K-D Tree", slug: "k-d-tree" }
+video: "rI2EBUEMfTk"
 sidebar:
  label: 'K Closest Points to Origin'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `points = [[1,3],[-2,2]], k = 1`
 - Output: `[[-2,2]]`
@@ -64,7 +72,3 @@ class Solution:

        return res
 ```
-
-## Explanation
-
-<YouTube id="rI2EBUEMfTk" title="K Closest Points to Origin - Heap / Priority Queue - Leetcode 973 - Python" />
@@ -2,13 +2,16 @@
 title: '102. Binary Tree Level Order Traversal'
 description: Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level)
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "6ZnyEApgFYg"
 sidebar:
  label: 'Binary Tree Level Order Traversal'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [3,9,20,null,null,15,7]`
 - Output: `[[3],[9,20],[15,7]]`
@@ -80,7 +83,3 @@ class Solution:

        return res
 ```
-
-## Explanation
-
-<YouTube id="6ZnyEApgFYg" title="Binary Tree Level Order Traversal - BFS - Leetcode 102" />
@@ -2,13 +2,17 @@
 title: '1448. Count Good Nodes in Binary Tree'
 description: Given a binary tree root, a node X in the tree is named good if in the path from root to X there are no nodes with a value greater than X
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "7cp5imvDzl4"
 sidebar:
  label: 'Count Good Nodes in Binary Tree'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [3,1,4,3,null,1,5]`
 - Output: `4`
@@ -67,7 +71,3 @@ class Solution:

        return dfs(root, root.val)
 ```
-
-## Explanation
-
-<YouTube id="7cp5imvDzl4" title="Microsoft's Most Asked Question 2021 - Count Good Nodes in a Binary Tree - Leetcode 1448 - Python" />
@@ -2,13 +2,17 @@
 title: '199. Binary Tree Right Side View'
 description: Given the root of a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "d4zLyf32e3I"
 sidebar:
  label: 'Binary Tree Right Side View'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [1,2,3,null,5,null,4]`
 - Output: `[1,3,4]`
@@ -83,7 +87,3 @@ class Solution:

        return res
 ```
-
-## Explanation
-
-<YouTube id="d4zLyf32e3I" title="Binary Tree Right Side View - Breadth First Search - Leetcode 199" />
@@ -2,13 +2,17 @@
 title: '104. Maximum Depth of Binary Tree'
 description: Given the root of a binary tree, return its maximum depth
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "hTM3phVI6YQ"
 sidebar:
  label: 'Maximum Depth of Binary Tree'
  badge: 'Easy'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [3,9,20,null,null,15,7]`
 - Output: `3`
@@ -48,7 +52,3 @@ class Solution:

        return 1 + max(self.maxDepth(root.left), self.maxDepth(root.right))
 ```
-
-## Explanation
-
-<YouTube id="hTM3phVI6YQ" title="Maximum Depth of Binary Tree - 3 Solutions - Leetcode 104 - Python" />
@@ -2,13 +2,17 @@
 title: '226. Invert Binary Tree'
 description: Given the root of a binary tree, invert the tree, and return its root
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+video: "OnSn2XEQ4MY"
 sidebar:
  label: 'Invert Binary Tree'
  badge: 'Easy'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [4,2,7,1,3,6,9]`
 - Output: `[4,7,2,9,6,3,1]`
@@ -59,7 +63,3 @@ class Solution:

        return root
 ```
-
-## Explanation
-
-<YouTube id="OnSn2XEQ4MY" title="Invert Binary Tree - Depth First Search - Leetcode 226" />
@@ -2,13 +2,17 @@
 title: '236. Lowest Common Ancestor of a Binary Tree'
 description: Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree
 icon: dot
+topics:
+  - { name: "Tree", slug: "tree" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Binary Tree", slug: "binary-tree" }
+  - { name: "Binary Lifting", slug: "binary-lifting" }
+  - { name: "Lowest Common Ancestor", slug: "lowest-common-ancestor" }
 sidebar:
  label: 'Lowest Common Ancestor of a Binary Tree'
  badge: 'Medium'
 ---

-<Badge variant="accent">Tree</Badge>
-
 ### Example 1:
 - Input: `root = [3,5,1,6,2,0,8,null,null,7,4], p = 5, q = 1`
 - Output: `3`
@@ -2,13 +2,17 @@
 title: '208. Implement Trie (Prefix Tree)'
 description: A trie (pronounced as "try") or prefix tree is a tree data structure used to efficiently store and retrieve keys in a dataset of strings. There are various applications of this data structure, such as autocomplete and spellchecker
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Design", slug: "design" }
+  - { name: "Trie", slug: "trie" }
+video: "oobqoCJlHA0"
 sidebar:
  label: 'Implement Trie (Prefix Tree)'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: ``
 - Output: ``
@@ -107,7 +111,3 @@ class Trie:
 # param_2 = obj.search(word)
 # param_3 = obj.startsWith(prefix)
 ```
-
-## Explanation
-
-<YouTube id="oobqoCJlHA0" title="Implement Trie (Prefix Tree) - Leetcode 208" />
@@ -2,13 +2,17 @@
 title: '211. Design Add and Search Words Data Structure'
 description: Design a data structure that supports adding new words and finding if a string matches any previously added string
 icon: dot
+topics:
+  - { name: "String", slug: "string" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Design", slug: "design" }
+  - { name: "Trie", slug: "trie" }
+video: "BTf05gs_8iU"
 sidebar:
  label: 'Design Add and Search Words Data Structure'
  badge: 'Medium'
 ---

-<Badge variant="accent">String</Badge>
-
 ### Constraints:

 - `1 <= word.length <= 25`
@@ -101,7 +105,3 @@ class WordDictionary:
 # obj.addWord(word)
 # param_3 = obj.search(word)
 ```
-
-## Explanation
-
-<YouTube id="BTf05gs_8iU" title="Design Add and Search Words Data Structure - Leetcode 211 - Python" />
@@ -2,13 +2,16 @@
 title: '127. Word Ladder'
 description: 'A transformation sequence from word beginWord to word endWord using a dictionary wordList is a sequence of words beginWord -> s1 -> s2 -> ... -> sk such that:'
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "String", slug: "string" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Bidirectional Search", slug: "bidirectional-search" }
 sidebar:
  label: 'Word Ladder'
  badge: 'Hard'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `beginWord = "hit", endWord = "cog", wordList = ["hot","dot","dog","lot","log","cog"]`
 - Output: `5`
@@ -2,13 +2,15 @@
 title: '994. Rotting Oranges'
 description: 'You are given an m x n grid where each cell can have one of three values:'
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Matrix", slug: "matrix" }
 sidebar:
  label: 'Rotting Oranges'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `grid = [[2,1,1],[1,1,0],[0,1,1]]`
 - Output: `4`
@@ -2,13 +2,16 @@
 title: '133. Clone Graph'
 description: Given a reference of a node in a connected undirected graph
 icon: dot
+topics:
+  - { name: "Hash Table", slug: "hash-table" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Graph Theory", slug: "graph" }
 sidebar:
  label: 'Clone Graph'
  badge: 'Medium'
 ---

-<Badge variant="accent">Hash Table</Badge>
-
 ### Example 1:
 - Input: `adjList = [[2,4],[1,3],[2,4],[1,3]]`
 - Output: `[[2,4],[1,3],[2,4],[1,3]]`
@@ -2,13 +2,17 @@
 title: '200. Number of Islands'
 description: Given an m x n 2D binary grid grid which represents a map of '1's (land) and '0's (water), return the number of islands
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Union-Find", slug: "union-find" }
+  - { name: "Matrix", slug: "matrix" }
 sidebar:
  label: 'Number of Islands'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `grid = [ ["1","1","1","1","0"], ["1","1","0","1","0"], ["1","1","0","0","0"], ["0","0","0","0","0"] ]`
 - Output: `1`
@@ -2,13 +2,16 @@
 title: '417. Pacific Atlantic Water Flow'
 description: There is an m x n rectangular island that borders both the Pacific Ocean and Atlantic Ocean. The Pacific Ocean touches the island's left and top edges, and the Atlantic Ocean touches the island's right and bottom edges
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Matrix", slug: "matrix" }
 sidebar:
  label: 'Pacific Atlantic Water Flow'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `heights = [[1,2,2,3,5],[3,2,3,4,4],[2,4,5,3,1],[6,7,1,4,5],[5,1,1,2,4]]`
 - Output: `[[0,4],[1,3],[1,4],[2,2],[3,0],[3,1],[4,0]]`
@@ -2,13 +2,17 @@
 title: '207. Course Schedule'
 description: There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i] = [ai, bi] indicates that you must take course bi first if you want to take course ai
 icon: dot
+topics:
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Graph Theory", slug: "graph" }
+  - { name: "Topological Sort", slug: "topological-sort" }
+  - { name: "Directed Acyclic Graph", slug: "directed-acyclic-graph" }
 sidebar:
  label: 'Course Schedule'
  badge: 'Medium'
 ---

-<Badge variant="accent">Depth-First Search</Badge>
-
 ### Example 1:
 - Input: `numCourses = 2, prerequisites = [[1,0]]`
 - Output: `true`
@@ -2,13 +2,16 @@
 title: '210. Course Schedule II'
 description: There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i] = [ai, bi] indicates that you must take course bi first if you want to take course ai
 icon: dot
+topics:
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Graph Theory", slug: "graph" }
+  - { name: "Topological Sort", slug: "topological-sort" }
 sidebar:
  label: 'Course Schedule II'
  badge: 'Medium'
 ---

-<Badge variant="accent">Depth-First Search</Badge>
-
 ### Example 1:
 - Input: `numCourses = 2, prerequisites = [[1,0]]`
 - Output: `[0,1]`
@@ -2,13 +2,16 @@
 title: '323. Number of Connected Components in an Undirected Graph'
 description: You have a graph of n nodes. You are given an integer n and an array edges where edges[i] = [ai, bi] indicates that there is an edge between ai and bi in the graph
 icon: dot
+topics:
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Union-Find", slug: "union-find" }
+  - { name: "Graph Theory", slug: "graph" }
 sidebar:
  label: 'Number of Connected Components in an Undirected Graph'
  badge: 'Medium'
 ---

-<Badge variant="accent">Depth-First Search</Badge>
-
 ### Example 1:
 - Input: `n = 5, edges = [[0,1],[1,2],[3,4]]`
 - Output: `2`
@@ -2,13 +2,16 @@
 title: '684. Redundant Connection'
 description: In this problem, a tree is an undirected graph that is connected and has no cycles
 icon: dot
+topics:
+  - { name: "Depth-First Search", slug: "depth-first-search" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Union-Find", slug: "union-find" }
+  - { name: "Graph Theory", slug: "graph" }
 sidebar:
  label: 'Redundant Connection'
  badge: 'Medium'
 ---

-<Badge variant="accent">Depth-First Search</Badge>
-
 ### Example 1:
 - Input: `edges = [[1,2],[1,3],[2,3]]`
 - Output: `[2,3]`
@@ -2,13 +2,14 @@
 title: '198. House Robber'
 description: You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopping you from robbing each of them is that adjacent houses have security systems connected and it will automatically contact the police if two adjacent houses were broken into on the same night
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Dynamic Programming", slug: "dynamic-programming" }
 sidebar:
  label: 'House Robber'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [1,2,3,1]`
 - Output: `4`
@@ -2,13 +2,17 @@
 title: '322. Coin Change'
 description: You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Dynamic Programming", slug: "dynamic-programming" }
+  - { name: "Breadth-First Search", slug: "breadth-first-search" }
+  - { name: "Knapsack Problem", slug: "knapsack-problem" }
+  - { name: "Complete Knapsack", slug: "complete-knapsack" }
 sidebar:
  label: 'Coin Change'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `coins = [1,2,5], amount = 11`
 - Output: `3`
@@ -2,13 +2,15 @@
 title: '70. Climbing Stairs'
 description: You are climbing a staircase. It takes n steps to reach the top
 icon: dot
+topics:
+  - { name: "Math", slug: "math" }
+  - { name: "Dynamic Programming", slug: "dynamic-programming" }
+  - { name: "Memoization", slug: "memoization" }
 sidebar:
  label: 'Climbing Stairs'
  badge: 'Easy'
 ---

-<Badge variant="accent">Math</Badge>
-
 ### Example 1:
 - Input: `n = 2`
 - Output: `2`
@@ -2,13 +2,14 @@
 title: '39. Combination Sum'
 description: Given an array of distinct integers candidates and a target integer target, return a list of all unique combinations of candidates where the chosen numbers sum to target. You may return the combinations in any order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Backtracking", slug: "backtracking" }
 sidebar:
  label: 'Combination Sum'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `candidates = [2,3,6,7], target = 7`
 - Output: `[[2,2,3],[7]]`
@@ -2,13 +2,14 @@
 title: '46. Permutations'
 description: Given an array nums of distinct integers, return all the possible permutations. You can return the answer in any order
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Backtracking", slug: "backtracking" }
 sidebar:
  label: 'Permutations'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [1,2,3]`
 - Output: `[[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,1,2],[3,2,1]]`
@@ -2,13 +2,15 @@
 title: '78. Subsets'
 description: Given an integer array nums of unique elements, return all possible subsets (the power set)
 icon: dot
+topics:
+  - { name: "Array", slug: "array" }
+  - { name: "Backtracking", slug: "backtracking" }
+  - { name: "Bit Manipulation", slug: "bit-manipulation" }
 sidebar:
  label: 'Subsets'
  badge: 'Medium'
 ---

-<Badge variant="accent">Array</Badge>
-
 ### Example 1:
 - Input: `nums = [1,2,3]`
 - Output: `[[],[1],[2],[1,2],[3],[1,3],[2,3],[1,2,3]]`
@@ -0,0 +1,8 @@
+---
+title: "Array"
+list: "https://leetcode.com/problem-list/array/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Array.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Bidirectional Search"
+list: "https://leetcode.com/problem-list/bidirectional-search/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Bidirectional Search.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Binary Lifting"
+list: "https://leetcode.com/problem-list/binary-lifting/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Binary Lifting.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Binary Tree"
+list: "https://leetcode.com/problem-list/binary-tree/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Binary Tree.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Bit Manipulation"
+list: "https://leetcode.com/problem-list/bit-manipulation/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Bit Manipulation.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Bracket Sequences"
+list: "https://leetcode.com/problem-list/bracket-sequences/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Bracket Sequences.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Bucket Sort"
+list: "https://leetcode.com/problem-list/bucket-sort/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Bucket Sort.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Complete Knapsack"
+list: "https://leetcode.com/problem-list/complete-knapsack/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Complete Knapsack.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Counting"
+list: "https://leetcode.com/problem-list/counting/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Counting.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Design"
+list: "https://leetcode.com/problem-list/design/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Design.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Directed Acyclic Graph"
+list: "https://leetcode.com/problem-list/directed-acyclic-graph/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Directed Acyclic Graph.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Divide and Conquer"
+list: "https://leetcode.com/problem-list/divide-and-conquer/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Divide and Conquer.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Doubly-Linked List"
+list: "https://leetcode.com/problem-list/doubly-linked-list/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Doubly-Linked List.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Floyd's Cycle Finding Algorithm"
+list: "https://leetcode.com/problem-list/floyds-cycle-finding-algorithm/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Floyd's Cycle Finding Algorithm.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Geometry"
+list: "https://leetcode.com/problem-list/geometry/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Geometry.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Graph Theory"
+list: "https://leetcode.com/problem-list/graph/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Graph Theory.
+:::
@@ -0,0 +1,8 @@
+---
+title: "K-D Tree"
+list: "https://leetcode.com/problem-list/k-d-tree/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged K-D Tree.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Knapsack Problem"
+list: "https://leetcode.com/problem-list/knapsack-problem/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Knapsack Problem.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Lowest Common Ancestor"
+list: "https://leetcode.com/problem-list/lowest-common-ancestor/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Lowest Common Ancestor.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Math"
+list: "https://leetcode.com/problem-list/math/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Math.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Memoization"
+list: "https://leetcode.com/problem-list/memoization/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Memoization.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Merge Sort"
+list: "https://leetcode.com/problem-list/merge-sort/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Merge Sort.
+:::
@@ -0,0 +1,3 @@
+import { defineMeta } from "blume";
+
+export default defineMeta({ title: "Guides" });
@@ -0,0 +1,8 @@
+---
+title: "Queue"
+list: "https://leetcode.com/problem-list/queue/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Queue.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Quickselect"
+list: "https://leetcode.com/problem-list/quickselect/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Quickselect.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Recursion"
+list: "https://leetcode.com/problem-list/recursion/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Recursion.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Simulation"
+list: "https://leetcode.com/problem-list/simulation/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Simulation.
+:::
@@ -0,0 +1,8 @@
+---
+title: "Sorting"
+list: "https://leetcode.com/problem-list/sorting/"
+---
+
+:::note
+This guide has not been written yet. The LeetCode list above has every problem tagged Sorting.
+:::