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‎.github/workflows/build-tests.yml

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

‎.github/workflows/test.yml

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

‎.github/workflows/update-usaco.yml

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@@ -0,0 +1,73 @@
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name: Fetch from usaco-problems
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on: workflow_dispatch
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jobs:
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update_problems:
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name: Update problems
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runs-on: ubuntu-latest
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steps:
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- name: Checkout usaco-guide
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uses: actions/checkout@v2
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with:
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fetch-depth: 0
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- name: Use Node.js 20.x
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uses: actions/setup-node@v1
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with:
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node-version: 20.x
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- name: Checkout usaco-problems
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uses: actions/checkout@v2
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with:
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repository: ${{ github.repository_owner }}/usaco-problems
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path: usaco-problems
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- name: Generate a token
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id: generate_token
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uses: actions/create-github-app-token@v1
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with:
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app-id: ${{ secrets.APP_ID }}
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private-key: ${{ secrets.APP_PRIVATE_KEY }}
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owner: ${{ github.repository_owner }}
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- name: Checkout auto
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run: |
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export pr_number=$(gh pr list --author 'usaco-autofetch[bot]' --json number --jq '.[0].number')
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echo "pr_number: $pr_number"
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if [ -z "$pr_number" ]
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then
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git checkout -B auto
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git push -f origin auto
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else
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git checkout auto
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fi
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pip install pre-commit
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pre-commit install
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env:
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GH_TOKEN: ${{ steps.generate_token.outputs.token }}
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- name: Update contest to points
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run: |
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pip install -r src/components/markdown/ProblemsList/DivisionList/scripts/requirements.txt
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python src/components/markdown/ProblemsList/DivisionList/scripts/update.py -s $(date +%y) -e $(date +%y)
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- name: Build list of problem ids
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run: |
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yarn
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yarn build
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echo 'ids.log tail:'
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cat -b ids.log | tail -n 10
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- name: Add new problems
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run: |
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npx ts-node --skipProject usaco-problems/add_problems
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git add .
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git config --global user.name usaco-autofetch[bot]
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git config --global user.email usaco-autofetch[bot]@users.noreply.github.com
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if git commit -m 'problem auto-updates'
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then
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git push origin auto
63+
if [ -z "$pr_number" ]
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then
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gh pr create --title 'Problem auto-updates' -F usaco-problems/out/report.txt
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else
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gh pr edit $pr_number -F usaco-problems/out/report.txt
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fi
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else
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echo 'Problems up to date!'
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fi
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env:
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GH_TOKEN: ${{ steps.generate_token.outputs.token }}

‎.gitignore

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@@ -88,3 +88,9 @@ build.css
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*.icloud
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.runtimeconfig.json
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# for problem auto-updates
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usaco-problems/
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# storybook
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storybook-static/

‎.pre-commit-config.yaml

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- id: check-yaml
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- id: check-added-large-files
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- repo: https://github.com/pre-commit/mirrors-prettier
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rev: v4.0.0-alpha.4
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rev: v4.0.0-alpha.8
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hooks:
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- id: prettier
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additional_dependencies:

‎.prettierrc

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{
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"$schema": "http://json.schemastore.org/prettierrc",
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"endOfLine": "lf",
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"semi": true,
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"singleQuote": true,
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"tabWidth": 2,
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"useTabs": false,
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"trailingComma": "es5",
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"arrowParens": "avoid",
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"plugins": ["prettier-plugin-organize-imports"],
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"overrides": [
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{
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"files": "*.md",

‎README.md

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@@ -9,9 +9,8 @@ Thank you to the following companies:
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- [Vercel](https://vercel.com/?utm_source=cp-initiative&utm_campaign=oss),
1111
hosting & continuous deployment
12+
- [Microsoft for Nonprofits](https://microsoft.com/)
1213
- [Algolia](https://algolia.com/), search functionality
13-
- [DigitalOcean](https://m.do.co/c/a07c32d07394), forum hosting
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- [Chromatic](https://www.chromatic.com/), visual testing
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- And [more](docs/Companies.md)!
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1716
## Documentation + Contributing
@@ -30,62 +29,6 @@ The USACO Guide is run by the
3029
Content Authors to join our team to help us improve the Guide! Learn more
3130
[here](https://docs.google.com/document/d/13QpXqdiYQwjBLnywGL1FUG7GFdh8SM_1NigIkJl-A7k/edit).
3231

33-
### Core Team
34-
35-
- Nathan Wang
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- Maggie Liu (Since Aug 2021)
37-
- Melody Yu (Since Aug 2021)
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- Andi Qu
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- Siyong Huang
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- Darren Yao
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- Michael Cao
42-
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### Content Managers
44-
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- Qi Wang (Since Jun 2021)
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- Dong Liu (Since Jun 2021)
47-
- Neo Wang (Since Aug 2021)
48-
- Kevin Sheng (Since Oct 2021)
49-
50-
### Former Core Team
51-
52-
- Benjamin Qi
53-
- Andrew Wang
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- Nathan Chen
55-
56-
### Current Content Authors
57-
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- Jesse Choe (Since Feb 2021)
59-
- Sofia Yang (Since Apr 2021)
60-
- Nathan Gong (Since Apr 2021)
61-
- Timothy Gao (Since May 2021)
62-
- Sathvik Chundru (Since May 2021)
63-
- Brad Ma (Since Jun 2021)
64-
- Albert Ye (Since Jun 2021)
65-
- Arpan Banerjee (Since Jun 2021)
66-
- Ryan Chou (Since Jul 2021)
67-
- Aadit Ambadkar (Since Aug 2021)
68-
- Dustin Miao (Since Aug 2021)
69-
- Ben Dodge (Since Aug 2021)
70-
- Jeffrey Zhang (Since Feb 2022)
71-
- Chongtian Ma (Since May 2022)
72-
- Aditya Gupta (Since Jun 2022)
73-
- Chuyang Wang (Since August 2022)
74-
- Aakash Gokhale (Since August 2022)
75-
- Paul Chen (Since August 2022)
76-
- Daniel Ge (Since June 2023)
77-
- _This could be you!
78-
[Apply here](https://docs.google.com/document/d/13QpXqdiYQwjBLnywGL1FUG7GFdh8SM_1NigIkJl-A7k/edit)._
79-
80-
### Past Content Authors
81-
82-
- Óscar Garries Urbina
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- Mrinall Umasudhan
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- Andrew Cheng
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- Zhixin Wang
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- Jeffrey Meng
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- Ananth Kashyap
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## Tech Stack
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Our front-end is built with:

‎content/1_General/Fast_IO.problems.json

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"uniqueId": "usaco-674",
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"name": "Robotic Cow Herd",
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"url": "http://www.usaco.org/index.php?page=viewproblem2&cpid=674",
8-
"source": "Plat",
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"source": "Platinum",
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"difficulty": "Insane",
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"isStarred": false,
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"tags": [],

‎content/1_General/Olympiads.mdx

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<Resource
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source="IOI"
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title="Syllabus"
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url="https://people.ksp.sk/~misof/ioi-syllabus/"
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url="https://algo.sk/ioi-syllabus/"
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starred
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>
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topics that can and cannot appear on IOI

‎content/1_General/USACO_FAQs.mdx

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@@ -22,9 +22,11 @@ Register for a (free) account on [usaco.org](http://www.usaco.org/), then wait u
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the four-day contest window starts. When the contest window begins,
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the USACO homepage will update with instructions on how to participate.
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25-
The USACO Guide is not affiliated with the USACO. If you encounter any issues
26-
with [usaco.org](http://www.usaco.org/) (e.g., trouble registering for an account),
27-
contact the USACO contest director (Brian Dean) rather than the USACO Guide.
25+
### Q: I'm not receiving an email after registering on [usaco.org](http://www.usaco.org/) with my gmail account. Who do I ask for help?
26+
27+
This is a known issue. If you encounter any technical issues with [usaco.org](http://www.usaco.org/), contact the USACO contest director ([Brian Dean](mailto:bcdean@clemson.edu)).
28+
**Do not** submit to the USACO Guide contact form; the USACO Guide is not
29+
affiliated with the USACO, so we won't be able to help you.
2830

2931
### Q: Do I need to participate in the USACO December contest before participating in the other contests?
3032

@@ -181,7 +183,13 @@ about competitive programming.
181183

182184
### Q: Why does the website give me WA when my code gives the correct answer on my own computer?
183185

184-
It's likely due to undefined behavior; see [here](/general/debugging-checklist?lang=cpp#wrong-answer-or-runtime-error) for more information.
186+
It's likely due to undefined behavior; see [this module](/general/debugging-checklist?lang=cpp#wrong-answer-or-runtime-error) for more information.
187+
188+
### Q: What's wrong with my code?
189+
190+
Please follow **all** the instructions in [this forum post](https://forum.usaco.guide/t/how-to-ask-for-help-on-a-problem/338). You can try asking on the forum,
191+
but if it's clear that you haven't followed all of the instructions, likely
192+
the only response you will receive is to follow the instructions more carefully.
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186194
## Q: Where can I find USACO test data and official solutions?
187195

‎content/2_Bronze/Complete_Rec.problems.json

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}
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},
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{
86-
"uniqueId": "ccc-Twenty-four",
86+
"uniqueId": "ccc-twenty-four",
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"name": "Twenty-four",
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"url": "https://dmoj.ca/problem/ccc08s4",
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"source": "CCC",

‎content/2_Bronze/Conclusion.problems.json

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"site": "CF"
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}
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},
43+
{
44+
"uniqueId": "cf-1914C",
45+
"name": "Quests",
46+
"url": "https://codeforces.com/problemset/problem/1914/C",
47+
"source": "CF",
48+
"difficulty": "Easy",
49+
"isStarred": false,
50+
"tags": ["Simulation"],
51+
"solutionMetadata": {
52+
"kind": "internal"
53+
}
54+
},
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{
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"uniqueId": "cf-1772D",
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"name": "Absolute Sorting",

‎content/2_Bronze/Intro_Sets.mdx

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11
---
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id: intro-sets
3-
title: Introduction to Sets & Maps
3+
title: (Optional) Introduction to Sets & Maps
44
author: Darren Yao, Benjamin Qi, Allen Li, Jesse Choe, Nathan Gong
55
description: 'Maintaining collections of distinct elements/keys with sets and maps.'
66
frequency: 2
@@ -881,7 +881,7 @@ make their implementation easier.
881881

882882
</Quiz.Question>
883883
<Quiz.Question>
884-
What is the time complexity of insertions, deletions, and searches in an unordered map of size $N$?
884+
What's the average time complexity of a uniformly random sequence of insertions, deletions, and searches in an unordered map of size $N$?
885885
<Quiz.Answer correct>
886886
$\mathcal{O}(1)$
887887
<Quiz.Explanation>

‎content/3_Silver/Binary_Search.mdx

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</PySection>
11991199
</LanguageSection>
12001200
1201-
12021201
<Quiz.Answer>
1203-
$\mathcal{O}(\log n)$ / $\Omega(\log n)$
1202+
$\Theta(\log n)$ / $\Theta(\log n)$
12041203
<Quiz.Explanation>
12051204
Incorrect. Consider the case where the target element is the median of the array.
12061205
</Quiz.Explanation>
12071206
</Quiz.Answer>
12081207
<Quiz.Answer correct>
1209-
$\mathcal{O}(\log n)$ / $\Omega(1)$
1208+
$\Theta(\log n)$ / $\Theta(1)$
12101209
<Quiz.Explanation>
12111210
Correct. The worst case happens when the number is not present, and the best case occurs if the first number we check is the target value.
12121211
</Quiz.Explanation>
12131212
</Quiz.Answer>
12141213
<Quiz.Answer>
1215-
$\mathcal{O}(n)$ / $\Omega(\log n)$
1214+
$\Theta(n)$ / $\Theta(\log n)$
12161215
<Quiz.Explanation>
12171216
Incorrect. Binary search always takes at most $\lceil \log n \rceil$ iterations.
12181217
</Quiz.Explanation>
12191218
</Quiz.Answer>
12201219
<Quiz.Answer>
1221-
$\mathcal{O}(\log n)$ / $\Omega(\log \log n)$
1220+
$\Theta(\log n)$ / $\Theta(\log \log n)$
12221221
<Quiz.Explanation>
12231222
Incorrect. Consider the case where the target element is the median of the array.
12241223
</Quiz.Explanation>

‎content/3_Silver/Binary_Search.problems.json

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"uniqueId": "usaco-624",
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"name": "Load Balancing",
107107
"url": "http://www.usaco.org/index.php?page=viewproblem2&cpid=624",
108-
"source": "Plat",
108+
"source": "Platinum",
109109
"difficulty": "Insane",
110110
"isStarred": false,
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"tags": ["Binary Search", "Sorting"],

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