Nope , 5 and 6 are the correct one , if you can remember, in PT 3 we got some questions based on Threaded binary tree, at that time we are not aware of that , so it's 5 and 6Nope , 5 and 6 are the correct one , if you can remember, in PT 3 we got some questions based on Threaded binary tree, at that time we are not aware of that , so it's 5 and 6

ByAkhand 35t

Text Free A fast, minimal web tool that removes repeated paragraphs from text. Paste your content, paste the pattern you want gone, and get clean text instantly. Try it live → What It Does Text Free solves a specific problem: removing the same paragraph or sentence that appears repeatedly throughout a document — like disclaimers, watermarks, or injected ad text. Paste your full document Paste the repeated paragraph you want removed Click Clean Text Copy the result That's it. No sign-up, no ads, no tracking. Features Instant cleaning — text processing happens client-side with zero delay Built-in metrics — Firebase-powered usage tracking (hidden in deployed UI, re-enable easily) Mobile responsive — fully usable on phones and tablets Copy to clipboard — one-click result copying Single file — the entire app is one index.html Tech Stack Layer Technology Frontend HTML, JavaScript, Tailwind CSS Metrics Firebase Firestore (real-time) Hosting Vercel Fonts Inter (Google Fonts) Icons Font Awesome 6 Self-Hosting Prerequisites A Firebase project with Firestore enabled A Vercel account (or any static host) 1. Create the Firestore Document In your Firebase Console → Firestore, create: Collection: stats Document: global_metrics With these fields: Field Type Initial Value totalCharacters number 0 totalRemovals number 0 lastUpdated timestamp (any) 2. Set Firestore Security Rules Configure strict rules for stats/global_metrics. Your rules should enforce: Read: Allow public reads Update: Allow only if: Document has exactly the expected fields (totalCharacters, totalRemovals, lastUpdated) Both counters are numbers and increase monotonically Increments are bounded (set reasonable min/max per write) lastUpdated must be a server timestamp (request.time) Create / Delete: Deny completely Catch-all: Deny all other paths Refer to the Firestore Security Rules documentation for implementation details. 3. Deploy to Vercel Fork this repo, then add these environment variables in your Vercel project settings: Variable Description FIREBASE_API_KEY Your Firebase API key FIREBASE_AUTH_DOMAIN your-project.firebaseapp.com FIREBASE_PROJECT_ID Your Firebase project ID FIREBASE_STORAGE_BUCKET your-project.firebasestorage.app FIREBASE_MESSAGING_SENDER_ID Your messaging sender ID FIREBASE_APP_ID Your Firebase app ID FIREBASE_MEASUREMENT_ID Your Google Analytics measurement ID The build.sh script automatically injects these into index.html during deployment. 4. Local Development For local testing, manually replace the __PLACEHOLDER__ values in index.html with your Firebase config, then: python3 -m http.server 8000 Open http://localhost:8000 in your browser. Project Structure text-free/ ├── index.html # The entire app (single file) ├── build.sh # Vercel build script (injects env vars) ├── vercel.json # Vercel configuration ├── README.md └── Assets/ ├── textfree.svg # Brand icon ├── favicon.ico # Multi-size favicon ├── favicon-16x16.png ├── favicon-32x32.png ├── apple-touch-icon.png ├── android-chrome-192x192.png ├── android-chrome-512x512.png └── site.webmanifest Anti-Abuse Protections Since this is a frontend-only app with no authentication, metrics are protected by multiple layers: Layer What It Does Firestore rules Monotonic increase only, bounded increments, server timestamp enforced Signature dedup Same input won't trigger duplicate writes Session persistence Dedup state survives page refresh Rate limit Max 3 writes per 10-second window Cooldown 3-second minimum between writes Write lock Prevents concurrent Firestore transactions Button lock Disables button during async processing Input bounds Min 20 chars, max 50K chars, at least 1 removal

ByArthur Pendelton

Text Free A fast, minimal web tool that removes repeated paragraphs from text. Paste your content, paste the pattern you want gone, and get clean text instantly. Try it live → What It Does Text Free solves a specific problem: removing the same paragraph or sentence that appears repeatedly throughout a document — like disclaimers, watermarks, or injected ad text. Paste your full document Paste the repeated paragraph you want removed Click Clean Text Copy the result That's it. No sign-up, no ads, no tracking. Features Instant cleaning — text processing happens client-side with zero delay Built-in metrics — Firebase-powered usage tracking (hidden in deployed UI, re-enable easily) Mobile responsive — fully usable on phones and tablets Copy to clipboard — one-click result copying Single file — the entire app is one index.html Tech Stack Layer Technology Frontend HTML, JavaScript, Tailwind CSS Metrics Firebase Firestore (real-time) Hosting Vercel Fonts Inter (Google Fonts) Icons Font Awesome 6 Self-Hosting Prerequisites A Firebase project with Firestore enabled A Vercel account (or any static host) 1. Create the Firestore Document In your Firebase Console → Firestore, create: Collection: stats Document: global_metrics With these fields: Field Type Initial Value totalCharacters number 0 totalRemovals number 0 lastUpdated timestamp (any) 2. Set Firestore Security Rules Configure strict rules for stats/global_metrics. Your rules should enforce: Read: Allow public reads Update: Allow only if: Document has exactly the expected fields (totalCharacters, totalRemovals, lastUpdated) Both counters are numbers and increase monotonically Increments are bounded (set reasonable min/max per write) lastUpdated must be a server timestamp (request.time) Create / Delete: Deny completely Catch-all: Deny all other paths Refer to the Firestore Security Rules documentation for implementation details. 3. Deploy to Vercel Fork this repo, then add these environment variables in your Vercel project settings: Variable Description FIREBASE_API_KEY Your Firebase API key FIREBASE_AUTH_DOMAIN your-project.firebaseapp.com FIREBASE_PROJECT_ID Your Firebase project ID FIREBASE_STORAGE_BUCKET your-project.firebasestorage.app FIREBASE_MESSAGING_SENDER_ID Your messaging sender ID FIREBASE_APP_ID Your Firebase app ID FIREBASE_MEASUREMENT_ID Your Google Analytics measurement ID The build.sh script automatically injects these into index.html during deployment. 4. Local Development For local testing, manually replace the __PLACEHOLDER__ values in index.html with your Firebase config, then: python3 -m http.server 8000 Open http://localhost:8000 in your browser. Project Structure text-free/ ├── index.html # The entire app (single file) ├── build.sh # Vercel build script (injects env vars) ├── vercel.json # Vercel configuration ├── README.md └── Assets/ ├── textfree.svg # Brand icon ├── favicon.ico # Multi-size favicon ├── favicon-16x16.png ├── favicon-32x32.png ├── apple-touch-icon.png ├── android-chrome-192x192.png ├── android-chrome-512x512.png └── site.webmanifest Anti-Abuse Protections Since this is a frontend-only app with no authentication, metrics are protected by multiple layers: Layer What It Does Firestore rules Monotonic increase only, bounded increments, server timestamp enforced Signature dedup Same input won't trigger duplicate writes Session persistence Dedup state survives page refresh Rate limit Max 3 writes per 10-second window Cooldown 3-second minimum between writes Write lock Prevents concurrent Firestore transactions Button lock Disables button during async processing Input bounds Min 20 chars, max 50K chars, at least 1 removal Metrics

ByArthur Pendelton