Merge branch 'master' into eslint

Author: xyzqm

.github/(archived) module-review.md

@@ -12,6 +12,10 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v2
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v1
+        with:
+          node-version: 20.x
       - uses: dart-lang/setup-dart@v1
 
       - name: Cache node modules

.github/workflows/build-tests.yml

@@ -19,7 +19,10 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0 # Required to retrieve git history of Chromatic
-
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v1
+        with:
+          node-version: 20.x
       - name: Cache node modules
         uses: actions/cache@v2
         id: cache-node-modules
@@ -51,10 +54,10 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v2
-      - name: Use Node.js 14.x
+      - name: Use Node.js 20.x
         uses: actions/setup-node@v1
         with:
-          node-version: 14.x
+          node-version: 20.x
 
       - name: Cache node modules
         uses: actions/cache@v2
@@ -70,7 +73,7 @@ jobs:
 
       - name: run Lighthouse CI
         run: |
-          npm install -g @lhci/cli@0.7.x
+          npm install -g @lhci/cli@0.13.x
           lhci autorun
         env:
           LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}

.github/workflows/test.yml

@@ -10,6 +10,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: 0
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v1
+        with:
+          node-version: 20.x
       - name: Checkout usaco-problems
         uses: actions/checkout@v2
         with:

.github/workflows/update-usaco.yml

@@ -91,3 +91,6 @@ build.css
 
 # for problem auto-updates
 usaco-problems/
+
+# storybook
+storybook-static/

.gitignore

@@ -44,14 +44,14 @@ export const parameters = {
 };
 
 export const decorators = [
-  renderStory => (
+  Story => (
     <div className="grid storybook-container font-sans">
       <div className="h-full">
         <div className="p-4 sm:p-6 lg:p-8 max-w-4xl mx-auto">
           <p className="text-gray-800 text-2xl font-bold">Light Mode</p>
           <div className="h-4" />
           <DarkModeContext.Provider value={false}>
-            {renderStory()}
+            <Story />
           </DarkModeContext.Provider>
         </div>
       </div>
@@ -60,7 +60,7 @@ export const decorators = [
           <p className="text-gray-100 text-2xl font-bold">Dark Mode</p>
           <div className="h-4" />
           <DarkModeContext.Provider value={true}>
-            {renderStory()}
+            <Story />
           </DarkModeContext.Provider>
         </div>
       </div>

.storybook/preview.js

@@ -7,4 +7,4 @@ order: 4
 
 All problems from the
 [USACO 2021 February Contest](http://www.usaco.org/index.php?page=feb21results)
-have been added to the USACO problem table [here](/general/usaco-monthlies).
+have been added to the USACO problem table [here](https://www.usaco.guide/general/usaco-monthlies).

announcements/2021 Feb.mdx

@@ -0,0 +1,9 @@
+---
+date: 'Jan 25th, 2024'
+id: usaco-january-2024-workshop
+title: "USACO January 2024 Contest Workshop"
+order: 9
+---
+
+Learn how to solve the Bronze/Silver problems by experienced instructors from the USACO Jan 2024 contest, from intuition to code!
+Find more information and the registration link for the workshop [here!](https://joincpi.org/workshops/jan24)

announcements/2024 January Contest Workshop.mdx

@@ -0,0 +1,9 @@
+---
+date: 'Jan 23th, 2024'
+id: usaco-spring-2024-classes
+title: "USACO Spring 2024 Classes Registration Open!"
+order: 7
+---
+
+Registration for the Spring Session of USACO classes are now open! Head over to
+    the [CPI website](https://joincpi.org/classes) to register!

announcements/2024 Spring Classes.mdx

@@ -0,0 +1,9 @@
+---
+date: 'Jan 24th, 2024'
+id: usaco-spring-2024-tournament
+title: "USACO Spring 2024 Informatics Tournament Registration Open!"
+order: 8
+---
+
+The USACO.Guide Spring 2024 Informatics Tournament will be held on March 2nd, 2024. Registration and details
+can be found [here!](https://joincpi.org/tournament)

announcements/2024 Spring Tournament.mdx

@@ -9,4 +9,4 @@ We're opening access to [USACO Guide Groups](/groups) to everyone! Groups is a
 learning management system that allows assigning problems, posting
 announcements, and tracking progress with a leaderboard. Now, you're able to
 create your own group and invite your friends -- go to
-[the groups page](/groups) to get started.
+[the groups page](https://www.usaco.guide/groups) to get started.

announcements/Groups Open To Public.mdx

@@ -8,5 +8,5 @@ order: 3
 If this project has helped you, consider
 [giving us a star on Github](https://github.com/cpinitiative/usaco-guide)! As a
 fully open source project, we depend on community members like you to improve
-our product. Check out the [contributing](/general/contributing) module to learn
+our product. Check out the [contributing](https://usaco.guide/general/contributing) module to learn
 how you can help make the USACO Guide better.

announcements/Open Source.mdx

@@ -290,18 +290,6 @@
         "kind": "internal"
       }
     },
-    {
-      "uniqueId": "lc-MaximizeValueOfFunctionInABallPassingGame",
-      "name": "Maximize Value of Function in a Ball Passing Game",
-      "url": "https://leetcode.com/contest/weekly-contest-360/problems/maximize-value-of-function-in-a-ball-passing-game/",
-      "source": "LC",
-      "difficulty": "Hard",
-      "isStarred": false,
-      "tags": ["Functional Graph"],
-      "solutionMetadata": {
-        "kind": "none"
-      }
-    },
     {
       "uniqueId": "cf-412D",
       "name": "Giving Awards",

content/3_Silver/Conclusion.problems.json

@@ -143,7 +143,7 @@
       "uniqueId": "usaco-1020",
       "name": "Delegation",
       "url": "http://www.usaco.org/index.php?page=viewproblem2&cpid=1020",
-      "source": "Plat",
+      "source": "Platinum",
       "difficulty": "Normal",
       "isStarred": false,
       "tags": ["DP", "Tree", "Binary Search"],

content/4_Gold/.DS.swp

@@ -98,6 +98,18 @@
       "solutionMetadata": {
         "kind": "internal"
       }
+    },
+    {
+      "uniqueId": "cf-468B",
+      "name": "Two Sets",
+      "url": "https://codeforces.com/contest/468/problem/B",
+      "source": "CF",
+      "difficulty": "Normal",
+      "isStarred": false,
+      "tags": ["DSU"],
+      "solutionMetadata": {
+        "kind": "internal"
+      }
     }
   ],
   "harder": [
@@ -138,19 +150,6 @@
         "kind": "internal"
       }
     },
-    {
-      "uniqueId": "cf-468B",
-      "name": "Two Sets",
-      "url": "https://codeforces.com/contest/468/problem/B",
-      "source": "CF",
-      "difficulty": "Hard",
-      "isStarred": false,
-      "tags": ["DSU", "2SAT"],
-      "solutionMetadata": {
-        "kind": "autogen-label-from-site",
-        "site": "CF"
-      }
-    },
     {
       "uniqueId": "onlinejudgeorg-war",
       "name": "War",

content/4_Gold/DP_Trees.problems.json

@@ -135,13 +135,13 @@
       "uniqueId": "cf-1051F",
       "name": "The Shortest Statement",
       "url": "https://codeforces.com/contest/1051/problem/F",
-      "source": "AC",
+      "source": "CF",
       "difficulty": "Normal",
       "isStarred": false,
       "tags": ["Euler Tour"],
       "solutionMetadata": {
         "kind": "autogen-label-from-site",
-        "site": "AC"
+        "site": "CF"
       }
     },
     {

content/4_Gold/DSU.problems.json

@@ -334,10 +334,13 @@ int main() {
 		int a, b, c;
 		cin >> a >> b >> c;
 		a--, b--, c--;
-		if (!is_cutpoint[c]) {
-			cout << "YES" << '\n';
-		} else if (on_path(id[a], id[b], id[c])) {
-			cout << "NO" << '\n';
+		// The path does not exist in two cases:
+		// 1) a == c or b == c
+		// 2) c is a cutpoint and it lies on path between a and b in block-cut
+		// tree
+		if (a == c || b == c ||
+		    (is_cutpoint[c] && on_path(id[a], id[b], id[c]))) {
+			std::cout << "NO\n";
 		} else {
 			cout << "YES" << '\n';
 		}