Qwen3.5-4B-Instruct

123 tokens: 102 read, 21 written · 0 s · 60.8 tok/s

Passes when One sentence of 5 to 30 words saying the library opens earlier (8 a.m.) on weekdays.

Summarize this in one sentence of at most 30 words.

Starting March 3, the Millbrook Public Library will open at 8 a.m. instead of 10 a.m. on weekdays. The change follows a survey in which 62% of respondents asked for earlier hours. Weekend hours stay the same. The library will hire two part-time staff to cover the extra time, paid for by a state grant.

Millbrook Public Library extends weekday opening to 8 a.m. following community demand and state funding.

246 tokens: 196 read, 50 written · 1 s · 64.4 tok/s

Passes when Exactly three bullet points and nothing else, each at most 20 words, covering the launch moving to June 12, the approved marketing budget and Priya owning testing, and leaving out the webhook fix and the coffee machine.

Summarize these meeting notes as exactly three bullet points, each at most 20 words. Keep only the decisions and ownership changes that matter. Output only the bullet points.

Weekly sync, product team. Present: Priya, Omar, Jules, Sam.
- Omar reported that the payment provider fixed the webhook bug; no action needed.
- The launch date moves from June 5 to June 12 because the app store review is slow.
- Jules showed the new onboarding screens. Everyone liked them. Small copy changes only.
- The marketing budget of $40,000 was approved by finance on Monday.
- Priya will own end-to-end testing from now on; Sam hands over the test plan by Friday.
- Next sync is moved to Thursday at 10:00.
- Coffee machine on floor 3 is broken again.

* Launch date delayed to June 12 due to slow app store review.
* Jules approved new onboarding screens; minor copy changes required.
* Priya now owns end-to-end testing after receiving Sam's test plan by Friday.

133 tokens: 122 read, 11 written · 0 s · 63.2 tok/s

Passes when Both lines. Sentiment is mixed: the reviewer loves the battery and sound but is annoyed. The complaint names the charger or support in at most 12 words.

Read this product review and answer in exactly this format:
Sentiment: <positive, negative or mixed>
Complaint: <the main complaint in a few words>

I've used this speaker every day for a month. The battery is honestly amazing, easily two full days, and it sounds far better than its size suggests. But the charger that came in the box stopped working after a week, and support took nine days to reply. I bought a replacement cable myself. Would I buy it again? Probably, but I'm annoyed.

Sentiment: mixed
Complaint: broken charger

195 tokens: 137 read, 58 written · 1 s · 63.8 tok/s

Passes when At most 50 words with the 240 participants, the 12-week length and the 3.1-day result, and nothing the text does not say (no approval, cure, children or recommendation).

Summarize this in at most 50 words. Keep the key numbers. Do not add anything the text does not say.

In a randomized trial, 240 adults with chronic migraine took either the new drug or a placebo for 12 weeks. Those on the drug had 3.1 fewer headache days per month on average, compared with 1.9 fewer days for placebo. Nausea was the most common side effect, reported by 9% of the drug group. The authors note the trial lasted only 12 weeks and call for longer studies before any recommendation is made.

In a 12-week randomized trial of 240 adults with chronic migraine, the new drug reduced headache days by 3.1 versus 1.9 for placebo. Nausea affected 9% of the drug group. Authors call for longer studies before recommendations.

249 tokens: 216 read, 33 written · 1 s · 64.5 tok/s

Passes when Exactly four lines of the form "- owner: action": Dana sends the contract, Luis books the venue, Mei updates the budget sheet, Dana emails the caterer. Tom's declined offer, the logo and the invitations are left out.

List every action item in this email thread that someone has committed to do, as lines of the form "- <owner>: <action>". Leave out offers that were declined and things that turned out not to be needed. Output only the list.

From: Dana
Hi all, quick recap of what's still open for the June offsite. I'll send the revised contract to the hotel by Wednesday.

From: Tom
I can book the venue for the dinner if that helps?

From: Luis
Thanks Tom, but I'll book the venue myself since I already spoke to them. Also, no need to change the logo on the badges, it's fine as is.

From: Mei
I'll update the budget sheet with the new hotel price tonight.

From: Dana
Great. Oh, and I'll email the caterer about the vegetarian options. Tom, could you just double-check the date on the invitations? Actually never mind, I checked them this morning, they're correct.

- Dana: Send revised contract to hotel by Wednesday
- Mei: Update budget sheet with new hotel price tonight
- Dana: Email caterer about vegetarian options

160 tokens: 120 read, 40 written · 1 s · 64.2 tok/s

Passes when Only a JSON object with exactly name "Laura Chen", company "Northwind Traders", meeting_date "2025-05-14" and attendees the number 4.

Extract these fields from the email as a JSON object with exactly these keys: "name" (the sender's full name), "company", "meeting_date" (YYYY-MM-DD) and "attendees" (a number). Output only the JSON.

Hello! This is Laura Chen from Northwind Traders. We'd love to visit your workshop. Could we meet on the 14th of May 2025, any time after lunch? We'll be four people in total, including me. Best, Laura

{"name": "Laura Chen", "company": "Northwind Traders", "meeting_date": "2025-05-14", "attendees": 4}

Passes when Exactly four addresses, one per line, in order: info@harbor-events.org, speakers@harbor-events.org, mia.k@studio-nine.io, accounts@harbor-events.org. "jo at harbor dot org" is not written out in full, and its inbox is closed.

List every email address written out in full in this text (like name@example.com), one per line, in the order they first appear, without duplicates. Leave out any inbox the text says is closed. Output only the addresses.

Contacts for the conference: write to info@harbor-events.org for general questions, or to speakers@harbor-events.org if you are presenting. Our designer (mia.k@studio-nine.io) made the poster. Billing questions: accounts@harbor-events.org. Again, presenters use speakers@harbor-events.org. Please don't write to jo at harbor dot org, that inbox is closed.

151 tokens: 100 read, 51 written · 1 s · 64.4 tok/s

Passes when The header item,qty,price, then the four items with whole-number quantities and prices as plain numbers (no $).

Convert this shopping list to CSV with the header row item,qty,price. Write prices as plain numbers without a currency sign. Output only the CSV.

Apples - 12 @ $0.50
Bread loaf - 2 @ $3.25
Olive oil (1 l) - 1 @ $8.90
Eggs - 18 @ $0.30

item,qty,price
Apples,12,0.5
Bread loaf,2,3.25
Olive oil (1 l),1,8.9
Eggs,18,0.3

112 tokens: 101 read, 11 written · 0 s · 63.6 tok/s

Passes when Only 2025-02-07, the extended deadline.

What is the final submission deadline? Answer with the date only, in YYYY-MM-DD format.

The call for papers opened on 2 January 2025. Drafts were originally due January 20, but the committee extended the final submission deadline to 7 February 2025. Reviews are due by 28 February, and results will be announced on March 10, 2025.

2025-02-07

353 tokens: 278 read, 75 written · 1 s · 64.3 tok/s

Passes when Only a JSON array of the WARN line and the two ERROR lines, in order, with time, level and message copied exactly.

From this log, return a JSON array with one object per WARN or ERROR line, in order, each with the keys "time" (HH:MM:SS), "level" and "message". Output only the JSON.

2025-03-04 09:12:01 INFO  server started on port 8080
2025-03-04 09:12:07 WARN  config key "timeout" is deprecated
2025-03-04 09:13:44 INFO  user alice logged in
2025-03-04 09:15:02 ERROR database connection lost
2025-03-04 09:15:03 INFO  retrying in 5s
2025-03-04 09:15:08 INFO  database reconnected
2025-03-04 09:20:30 DEBUG cache hit ratio 0.93
2025-03-04 09:31:12 ERROR payment webhook returned 502

[{"time":"09:12:07","level":"WARN","message":"config key \"timeout\" is deprecated"},{"time":"09:15:02","level":"ERROR","message":"database connection lost"},{"time":"09:31:12","level":"ERROR","message":"payment webhook returned 502"}]

24 tokens: 22 read, 2 written · 0 s · 59.9 tok/s

Passes when Exactly OK, with nothing else, not even a full stop.

Reply with exactly the word OK and nothing else.

OK

65 tokens: 44 read, 21 written · 0 s · 64.2 tok/s

Passes when Exactly three lines about the sea, all lowercase, the third ending with a question mark.

Write exactly three lines about the sea. Every line must be entirely lowercase, and the third line must end with a question mark. Output only the three lines.

the waves crash against the shore
salt spray fills the salty air
does it ever truly sleep?

67 tokens: 48 read, 19 written · 0 s · 64.1 tok/s

Passes when Only JSON with exactly two keys: colors (three lowercase color names) and count (the number 3).

Return a JSON object with exactly two keys: "colors", a list of exactly three color names in lowercase, and "count", the number 3. Output only the JSON.

{"colors": ["red", "green", "blue"], "count": 3}

52 tokens: 41 read, 11 written · 0 s · 63.9 tok/s

Passes when One line: apple, apricot, banana, cherry, pear (any capitalization).

Sort these words alphabetically, ignoring case, and output them on one line separated by commas: pear, Apple, banana, cherry, apricot

apple, apricot, banana, cherry, pear

52 tokens: 48 read, 4 written · 0 s · 61.9 tok/s

Passes when Two words, both capitalized, with no letter e anywhere.

Suggest a product name for a solar-powered lamp. Rules: exactly two words, both capitalized, and the letter "e" must not appear anywhere. Output only the name.

SolarBolt

A shop sells pencils at 4 for $1.00. How much do 7 pencils cost, in dollars? Work it out, then end with a line "ANSWER: <number>".

Today is Sunday. What day of the week will it be 128 days from today? Work it out, then end with a line "ANSWER: <day>".

Gus, Dee and Hal each own exactly one pet: a cat, a dog or a fish, all different. Hal does not own the dog. Gus owns the fish. Who owns the cat? Work it out, then end with a line "ANSWER: <name>".

A train leaves at 13:35 and the trip takes 2 hours 25 minutes. At what time does it arrive? Work it out, then end with a line "ANSWER: <HH:MM>" in 24-hour time.

A tank holds 120 liters. Pipe A alone fills it in 3 hours, pipe B alone fills it in 15 hours, and a drain alone empties a full tank in 3 hours. With all three open and the tank starting empty, how many hours until it is full? Work it out, then end with a line "ANSWER: <number>".

What does this Python program print? Work it out, then end with a line "ANSWER: <output>".

def f(xs):
    return sorted(xs)[::-1][:3]

print(f([39, 29, 32, 22, 31, 8]))

What does this Python program print? Work it out, then end with a line "ANSWER: <output>".

def g(n):
    total = 0
    for i in range(1, n + 1):
        if i % 3 == 0 or i % 4 == 0:
            total += i
    return total

print(g(24))

188 tokens: 108 read, 80 written · 1 s · 64.4 tok/s

Passes when A final line ANSWER: 6 (it divides by one less than the count).

This function should return the mean of a non-empty list. Which line has the bug? Work it out, then end with a line "ANSWER: <line number>".

1  def average(numbers):
2      """Return the mean of a non-empty list of numbers."""
3      total = 0
4      for n in numbers:
5          total += n
6      count = len(numbers) - 1
7      return total / count

The bug is on line 6. The code calculates the count as `len(numbers) - 1`, but to calculate the mean, you need the total number of elements in the list, which is simply `len(numbers)`. Subtracting 1 results in an incorrect denominator (and would cause a division by zero error if the list has only one element).

ANSWER: 6

What rows does this SQL query return? Output only the rows, one per line, as customer,total in the query's order.

Table orders:
id | customer | amount
1  | ben      | 40
2  | cal      | 25
3  | ana      | 135
4  | ben      | 145
5  | ana      | 90
6  | cal      | 60

Query:
SELECT customer, SUM(amount) AS total
FROM orders
GROUP BY customer
HAVING SUM(amount) > 100
ORDER BY total DESC;

769 tokens: 711 read, 58 written · 1 s · 63.9 tok/s

Passes when One get_weather call for Lisbon in celsius, then an answer giving the 21 °C the tool returned.

What's the weather in Lisbon right now, in celsius?

1. user

   What's the weather in Lisbon right now, in celsius?

2. assistant

   get_weather({"city":"Lisbon","unit":"celsius"})

3. tool

   {"city": "Lisbon", "conditions": "sunny", "temperature": 21, "unit": "celsius"}

4. assistant

   The weather in Lisbon is currently sunny with a temperature of 21°C.

423 tokens: 419 read, 4 written · 0 s · 62.4 tok/s

Passes when No tool call, and the answer is 144.

What is 12 times 12?

1. user

   What is 12 times 12?

2. assistant

   144

980 tokens: 834 read, 146 written · 2 s · 64.2 tok/s

Passes when Converts 250 EUR to USD and to JPY in at most three calls, then gives both amounts: 270.50 USD and 40,125 JPY.

Convert 250 EUR to USD and to JPY.

1. user

   Convert 250 EUR to USD and to JPY.

2. assistant

   convert_currency({"amount":250,"from":"EUR","to":"USD"})

   convert_currency({"amount":250,"from":"EUR","to":"JPY"})

3. tool

   {"amount": 270.5, "currency": "USD"}

4. tool

   {"amount": 40125, "currency": "JPY"}

5. assistant

   Here are the conversions for 250 EUR:
   
   *   **USD:** $270.50
   *   **JPY:** ¥40,125

1,361 tokens: 1,266 read, 95 written · 2 s · 64 tok/s

Passes when Looks up the customer first, asks for C-1042's orders, then reports A-77 shipped and A-80 processing.

What is the status of each order for the customer with the email kim@example.com?

1. user

   What is the status of each order for the customer with the email kim@example.com?

2. assistant

   find_customer({"email":"kim@example.com"})

3. tool

   {"customer_id": "C-1042", "name": "Kim Park"}

4. assistant

   get_orders({"customer_id":"C-1042"})

5. tool

   {"orders": [{"carrier": "DHL", "order_id": "A-77", "status": "shipped"}, {"order_id": "A-80", "status": "processing"}]}

6. assistant

   The customer with the email kim@example.com has two orders:
   *   Order A-77 (DHL): shipped
   *   Order A-80: processing

857 tokens: 749 read, 108 written · 2 s · 64.2 tok/s

Passes when Tries 19:00 for 2 people, never books another time without asking, does not claim the booking succeeded, and offers 18:30 or 20:30.

Book a table for 2 people at Luigi's tonight at 19:00.

1. user

   Book a table for 2 people at Luigi's tonight at 19:00.

2. assistant

   book_table({"restaurant":"Luigi's","people":2,"time":"19:00"})

3. tool

   {"available_times": ["18:30", "20:30"], "error": "fully booked at that time"}

4. assistant

   I'm sorry, but Luigi's is fully booked for 7:00 PM tonight. However, we do have availability at 6:30 PM or 8:30 PM. Would you like to book one of those times instead?

1,934 tokens: 123 read, 1,811 written · 28 s · 64.2 tok/s

Passes when A <header> with an <h1> naming the bakery, a <nav> with exactly 3 links, a <main> with <section id="menu"> holding at least 4 list items, and a <footer> with opening hours. Nothing loaded from another site and no network requests.

Build a one-page website for a bakery called "Crumb & Co". It must have a <header> containing an <h1> with the bakery's name; a <nav> with exactly 3 links; a <main> with a <section id="menu"> listing at least 4 items in a list; and a <footer> with the opening hours. Output one complete HTML document and nothing else. Put all CSS and JavaScript inline. Do not load anything from another site: no external scripts, stylesheets, fonts or images.

Open the page on its own. It runs in a sandbox: no network, no access to this site.

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Crumb & Co</title>
    <style>
        /* General Reset and Typography */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: 'Georgia', serif;
            background-color: #fdf6e3;
            color: #4a3b2a;
            line-height: 1.6;
        }

        /* Header Styles */
        header {
            background-color: #dcbfa8;
            padding: 2rem 0;
            text-align: center;
            border-bottom: 5px solid #c49a6c;
        }

        h1 {
            font-size: 3.5rem;
            color: #fff;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
            letter-spacing: 2px;
        }

        /* Navigation Styles */
        nav {
            background-color: #3e2723;
            position: sticky;
            top: 0;
            z-index: 100;
        }

        nav ul {
            list-style: none;
            display: flex;
            justify-content: center;
            gap: 2rem;
            padding: 0.5rem;
        }

        nav a {
            color: #fff;
            text-decoration: none;
            font-family: 'Arial', sans-serif;
            font-weight: bold;
            font-size: 1.1rem;
            transition: color 0.3s ease;
        }

        nav a:hover {
            color: #ffcc80;
        }

        /* Main Content Styles */
        main {
            max-width: 800px;
            margin: 2rem auto;
            padding: 0 1.5rem;
        }

        section#menu {
            background-color: #fff;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            margin-bottom: 2rem;
        }

        h2 {
            text-align: center;
            color: #c49a6c;
            margin-bottom: 1.5rem;
            font-family: 'Arial', sans-serif;
            border-bottom: 2px solid #eee;
            padding-bottom: 0.5rem;
        }

        ul.menu-list {
            list-style-type: none;
        }

        li.menu-item {
            display: flex;
            justify-content: space-between;
            align-items: baseline;
            margin-bottom: 1rem;
            border-bottom: 1px dashed #e0d0c0;
            padding-bottom: 0.5rem;
        }

        .item-name {
            font-weight: bold;
            font-size: 1.2rem;
        }

        .item-desc {
            font-style: italic;
            color: #666;
            margin-left: 1rem;
        }

        .item-price {
            font-weight: bold;
            color: #d35400;
            min-width: 80px;
            text-align: right;
        }

        /* Footer Styles */
        footer {
            background-color: #2c1e1a;
            color: #fff;
            text-align: center;
            padding: 2rem 0;
            margin-top: auto;
        }

        .hours-container {
            display: flex;
            justify-content: center;
            gap: 2rem;
            font-family: 'Arial', sans-serif;
            font-size: 1.1rem;
        }

        /* Responsive Design */
        @media (max-width: 600px) {
            h1 { font-size: 2.5rem; }
            
            nav ul {
                flex-direction: column;
                gap: 1rem;
            }

            .hours-container {
                flex-direction: column;
                gap: 1rem;
            }
        }
    </style>
</head>
<body>

    <header>
        <h1>Crumb & Co</h1>
    </header>

    <nav>
        <ul>
            <li><a href="#menu">Our Menu</a></li>
            <li><a href="#">About Us</a></li>
            <li><a href="#contact">Contact</a></li>
        </ul>
    </nav>

    <main>
        <section id="menu">
            <h2>Freshly Baked Selection</h2>
            <ul class="menu-list">
                <li class="menu-item">
                    <span class="item-name">Classic Sourdough</span>
                    <span class="item-desc">Rustic crust with a tangy finish</span>
                    <span class="item-price">$6.50</span>
                </li>
                <li class="menu-item">
                    <span class="item-name">Almond Croissant</span>
                    <span class="item-desc">Flaky pastry filled with sweet almond cream</span>
                    <span class="item-price">$4.75</span>
                </li>
                <li class="menu-item">
                    <span class="item-name">Berry Blueberry Muffin</span>
                    <span class="item-desc">Packed with fresh seasonal berries</span>
                    <span class="item-price">$3.50</span>
                </li>
                <li class="menu-item">
                    <span class="item-name">Chocolate Lava Cake</span>
                    <span class="item-desc">Warm molten center served with vanilla ice cream</span>
                    <span class="item-price">$7.00</span>
                </li>
            </ul>
        </section>

        <!-- Placeholder for About Us and Contact sections to satisfy semantic structure, though not explicitly requested in the prompt's list, they are standard for a main section -->
        <section id="about">
            <h2>About Crumb & Co</h2>
            <p>We are a family-owned bakery dedicated to bringing you the finest artisan breads and pastries. Every item is baked fresh every morning using locally sourced ingredients.</p>
        </section>

        <section id="contact">
            <h2>Visit Us</h2>
            <p>123 Baker Street, Sweetville</p>
        </section>
    </main>

    <footer>
        <div class="hours-container">
            <span><strong>Mon - Fri:</strong> 7:00 AM - 6:00 PM</span>
            <span><strong>Sat - Sun:</strong> 8:00 AM - 4:00 PM</span>
        </div>
    </footer>

    <script>
        // Simple script to handle smooth scrolling for navigation links
        document.querySelectorAll('nav a').forEach(anchor => {
            anchor.addEventListener('click', function (e) {
                e.preventDefault();
                const targetId = this.getAttribute('href');
                const targetSection = document.querySelector(targetId);

                if (targetSection) {
                    window.scrollTo({
                        top: targetSection.offsetTop - 70, // Offset for sticky header
                        behavior: 'smooth'
                    });
                }
            });
        });

        // Console greeting
        console.log("Welcome to Crumb & Co Website!");
    </script>

</body>
</html>
```

2,152 tokens: 94 read, 2,058 written · 32 s · 64.1 tok/s

Passes when Three elements with class plan, each holding a price, and a <button id="billing-toggle"> handled by script; the page switches between monthly and yearly. Nothing loaded from another site and no network requests.

Build a pricing page with three plans. Each plan is an element with class "plan" containing an element with class "price". Add a <button id="billing-toggle"> that switches every price between monthly and yearly billing when clicked. Output one complete HTML document and nothing else. Put all CSS and JavaScript inline. Do not load anything from another site: no external scripts, stylesheets, fonts or images.

Open the page on its own. It runs in a sandbox: no network, no access to this site.

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Pricing Page</title>
    <style>
        :root {
            --primary-color: #4f46e5;
            --bg-color: #f3f4f6;
            --card-bg: #ffffff;
            --text-main: #1f2937;
            --text-secondary: #6b7280;
            --border-color: #e5e7eb;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            margin: 0;
            padding: 40px 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        h1 {
            text-align: center;
            margin-bottom: 40px;
            font-size: 2.5rem;
            color: var(--text-main);
        }

        .pricing-container {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            max-width: 1200px;
            width: 100%;
        }

        .plan {
            background-color: var(--card-bg);
            border-radius: 12px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            padding: 30px;
            width: 300px;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-color);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .plan:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }

        .plan h3 {
            font-size: 1.5rem;
            margin-top: 0;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .price {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin: 20px 0;
            display: flex;
            align-items: baseline;
        }

        .price span {
            font-size: 1rem;
            color: var(--text-secondary);
            font-weight: 400;
            margin-left: 5px;
        }

        .features {
            list-style: none;
            padding: 0;
            margin: 20px 0 30px 0;
            flex-grow: 1;
        }

        .features li {
            padding: 8px 0;
            color: var(--text-secondary);
            border-bottom: 1px solid #f3f4f6;
        }

        .features li:last-child {
            border-bottom: none;
        }

        button {
            width: 100%;
            padding: 12px;
            border-radius: 8px;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
        }

        .btn-outline:hover {
            background-color: #eef2ff;
        }

        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }

        .btn-primary:hover {
            background-color: #4338ca;
        }

        /* Toggle Switch Styling */
        .toggle-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 100;
        }

        #billing-toggle {
            background-color: var(--text-main);
            color: white;
            padding: 10px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        }

        #billing-toggle:hover {
            background-color: black;
        }

        /* Mobile Responsiveness */
        @media (max-width: 768px) {
            .pricing-container {
                flex-direction: column;
                align-items: center;
            }
            
            .toggle-container {
                position: relative;
                top: 0;
                right: 0;
                margin-bottom: 20px;
            }
        }
    </style>
</head>
<body>

    <h1>Choose Your Plan</h1>

    <div class="toggle-container">
        <button id="billing-toggle">Switch to Yearly</button>
    </div>

    <div class="pricing-container">
        <!-- Basic Plan -->
        <div class="plan">
            <h3>Basic</h3>
            <div class="price" id="price-basic">$0<span>/mo</span></div>
            <ul class="features">
                <li>1 User</li>
                <li>5 Projects</li>
                <li>Community Support</li>
            </ul>
            <button class="btn-outline">Get Started</button>
        </div>

        <!-- Pro Plan -->
        <div class="plan" style="border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.1);">
            <h3>Pro</h3>
            <div class="price" id="price-pro">$29<span>/mo</span></div>
            <ul class="features">
                <li>5 Users</li>
                <li>Unlimited Projects</li>
                <li>Priority Support</li>
                <li>Analytics Dashboard</li>
            </ul>
            <button class="btn-primary">Get Started</button>
        </div>

        <!-- Enterprise Plan -->
        <div class="plan">
            <h3>Enterprise</h3>
            <div class="price" id="price-enterprise">$99<span>/mo</span></div>
            <ul class="features">
                <li>Unlimited Users</li>
                <li>SSO & Security</li>
                <li>Dedicated Manager</li>
                <li>SLA Guarantee</li>
            </ul>
            <button class="btn-outline">Contact Sales</button>
        </div>
    </div>

    <script>
        document.addEventListener('DOMContentLoaded', () => {
            const toggleBtn = document.getElementById('billing-toggle');
            const prices = [
                document.getElementById('price-basic'),
                document.getElementById('price-pro'),
                document.getElementById('price-enterprise')
            ];

            // Initial state: Monthly
            let isYearly = false;

            toggleBtn.addEventListener('click', () => {
                isYearly = !isYearly;
                
                // Update button text
                if (isYearly) {
                    toggleBtn.textContent = 'Switch to Monthly';
                } else {
                    toggleBtn.textContent = 'Switch to Yearly';
                }

                prices.forEach(priceElement => {
                    const basePrice = priceElement.innerText.replace('$', '').replace(/<span[^>]*>/, '');
                    
                    if (isYearly) {
                        // Calculate yearly price (approx 1/12th off)
                        const monthlyVal = parseFloat(basePrice);
                        const yearlyVal = Math.floor(monthlyVal * 12 * 0.9);
                        
                        // Update text content: $X<span>/yr</span>
                        priceElement.innerHTML = `$${yearlyVal}<span>/yr</span>`;
                    } else {
                        // Reset to monthly
                        priceElement.innerHTML = `$${basePrice}<span>/mo</span>`;
                    }
                });
            });
        });
    </script>
</body>
</html>
```

982 tokens: 129 read, 853 written · 13 s · 64.3 tok/s

Passes when <form id="signup"> with name, email (type email) and password (type password, minlength 8 or more) inputs, each with a <label for>; a submit button; an element id="status" with role="status"; and script that stops the submit and writes to the status. Nothing loaded from another site and no network requests.

Build a sign-up form: <form id="signup"> with inputs id="name", id="email" (type email) and id="password" (type password, minlength at least 8), each with a <label for>, and a submit button. When the form is submitted and valid, prevent the real submission and show a confirmation in an element with id="status" and role="status". Output one complete HTML document and nothing else. Put all CSS and JavaScript inline. Do not load anything from another site: no external scripts, stylesheets, fonts or images.

Open the page on its own. It runs in a sandbox: no network, no access to this site.

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Sign Up Form</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            background-color: #f4f4f9;
        }

        form {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            width: 300px;
        }

        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #333;
        }

        input {
            width: 100%;
            padding: 10px;
            margin-bottom: 15px;
            border: 1px solid #ccc;
            border-radius: 4px;
            box-sizing: border-box; /* Ensures padding doesn't affect width */
        }

        input:focus {
            outline: none;
            border-color: #007bff;
        }

        button {
            width: 100%;
            padding: 10px;
            background-color: #007bff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
        }

        button:hover {
            background-color: #0056b3;
        }

        #status {
            margin-top: 20px;
            padding: 10px;
            border-radius: 4px;
            text-align: center;
            display: none; /* Hidden by default */
        }

        #status.success {
            background-color: #d4edda;
            color: #155724;
            border: 1px solid #c3e6cb;
        }

        #status.error {
            background-color: #f8d7da;
            color: #721c24;
            border: 1px solid #f5c6cb;
        }
    </style>
</head>
<body>

<form id="signup">
    <label for="name">Name</label>
    <input type="text" id="name" required>

    <label for="email">Email</label>
    <input type="email" id="email" required>

    <label for="password">Password (min 8 chars)</label>
    <input type="password" id="password" minlength="8" required>

    <button type="submit">Sign Up</button>
</form>

<div id="status" role="status"></div>

<script>
    document.getElementById('signup').addEventListener('submit', function(event) {
        // Prevent default form submission
        event.preventDefault();

        const statusElement = document.getElementById('status');
        
        // Clear previous status
        statusElement.className = '';
        statusElement.textContent = 'Account created successfully!';
        statusElement.style.display = 'block';
        statusElement.classList.add('success');

        // Optional: Reset form after a short delay or keep it filled
        // setTimeout(() => {
        //     this.reset();
        // }, 3000);
    });
</script>

</body>
</html>
```

1,232 tokens: 117 read, 1,115 written · 17 s · 64.3 tok/s

Passes when The input, add button and list with the given ids, and script that saves to localStorage under "todos" and adds list items with a remove control. Nothing loaded from another site and no network requests.

Build a to-do list app with an <input id="new-task">, a <button id="add"> and a <ul id="tasks">. Clicking add appends the text as an <li> with its own remove button. Save the list in localStorage under the key "todos" and load it again when the page opens. Output one complete HTML document and nothing else. Put all CSS and JavaScript inline. Do not load anything from another site: no external scripts, stylesheets, fonts or images.

Open the page on its own. It runs in a sandbox: no network, no access to this site.

```html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>To-Do List</title>
    <style>
        body {
            font-family: sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            margin: 0;
            background-color: #f4f4f9;
        }

        .container {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            width: 350px;
        }

        h2 {
            margin-top: 0;
            text-align: center;
            color: #333;
        }

        .input-group {
            display: flex;
            gap: 10px;
            margin-bottom: 20px;
        }

        input[type="text"] {
            flex-grow: 1;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }

        button#add {
            padding: 10px 20px;
            background-color: #28a745;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
        }

        button#add:hover {
            background-color: #218838;
        }

        ul#tasks {
            list-style-type: none;
            padding: 0;
        }

        li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #fff;
            border-bottom: 1px solid #eee;
            padding: 10px 0;
        }

        li span {
            word-break: break-all;
        }

        .delete-btn {
            background-color: #dc3545;
            color: white;
            border: none;
            padding: 5px 10px;
            border-radius: 4px;
            cursor: pointer;
            margin-left: 10px;
        }

        .delete-btn:hover {
            background-color: #c82333;
        }
    </style>
</head>
<body>

<div class="container">
    <h2>To-Do List</h2>
    <div class="input-group">
        <input id="new-task" type="text" placeholder="Add a new task...">
        <button id="add">Add</button>
    </div>
    <ul id="tasks"></ul>
</div>

<script>
    // Select DOM elements
    const input = document.getElementById('new-task');
    const addBtn = document.getElementById('add');
    const tasksList = document.getElementById('tasks');

    // Load todos from localStorage on startup
    let todos = JSON.parse(localStorage.getItem('todos')) || [];

    // Function to save todos to localStorage
    function saveTodos() {
        localStorage.setItem('todos', JSON.stringify(todos));
    }

    // Function to render the list
    function renderTasks() {
        tasksList.innerHTML = ''; // Clear current list
        
        todos.forEach((todo, index) => {
            const li = document.createElement('li');
            
            const span = document.createElement('span');
            span.textContent = todo;
            
            const deleteBtn = document.createElement('button');
            deleteBtn.textContent = 'Remove';
            deleteBtn.className = 'delete-btn';
            deleteBtn.onclick = function() {
                todos.splice(index, 1); // Remove from array
                saveTodos(); // Save to storage
                renderTasks(); // Re-render
            };

            li.appendChild(span);
            li.appendChild(deleteBtn);
            tasksList.appendChild(li);
        });
    }

    // Function to add a new task
    function addTask() {
        const text = input.value.trim();
        if (text !== '') {
            todos.push(text);
            saveTodos();
            renderTasks();
            input.value = ''; // Clear input field
            input.focus();
        }
    }

    // Event Listeners
    addBtn.addEventListener('click', addTask);

    // Allow pressing "Enter" to add task
    input.addEventListener('keypress', function (e) {
        if (e.key === 'Enter') {
            addTask();
        }
    });

    // Initial render
    renderTasks();
</script>

</body>
</html>
```

Passes when Five <rect class="bar"> in an <svg>, written in the markup, with heights proportional to 12, 30, 18, 24 and 6 in that order, labelled Mon to Fri in <text>, and a <title> or aria-label. Nothing loaded from another site and no network requests.

Draw an inline SVG bar chart of coffee sold: Mon 12, Tue 30, Wed 18, Thu 24, Fri 6. Each bar is a <rect class="bar"> whose height attribute is proportional to its value, each bar is labelled with its day in a <text>, and the <svg> has a <title> or an aria-label. Write the bars and labels directly in the SVG markup, not with JavaScript. Output one complete HTML document and nothing else. Put all CSS and JavaScript inline. Do not load anything from another site: no external scripts, stylesheets, fonts or images.

Build the game 2048 as one web page, playable with the arrow keys, with the board drawn on the page.

In <script id="game">, define createGame() returning an object with move(dir) and state(). dir is "up", "down", "left" or "right". state() returns {board, score, over}: board is 4 rows of 4 numbers, top row first (0 is an empty cell), score is a number, over is a boolean.

The rules, exactly:
1. The board starts as this one, then a 2 is put in each of the first two empty cells in reading order (row by row from the top, left to right). The score starts at 0.
[2, 32, 0, 0]
[8, 0, 0, 8]
[16, 0, 0, 0]
[0, 0, 0, 4]
2. A move slides every tile as far as it goes toward dir. Two tiles of the same value that meet merge into one tile of their sum, nearest the side they move toward first: moving left, [2,2,2,2] becomes [4,4,0,0] and [2,2,2,0] becomes [4,2,0,0]. A tile made by a merge does not merge again in the same move.
3. Each merge adds the new tile's value to the score.
4. If a move changed the board, a 2 is put in the first empty cell in reading order. A move that changes nothing does nothing.
5. over is true when no move would change the board; then moves do nothing.

Output one complete HTML document and nothing else, with all CSS and JavaScript inline and nothing loaded from another site. Put the game logic, and only it, in <script id="game">: it must not touch document, window or timers, because the site runs that script on its own and plays the game through createGame(). Wire the page in another <script>.

Build Snake as one web page on a 10 by 10 grid, playable with the arrow keys (one key press, one step), with the grid drawn on the page.

In <script id="game">, define createGame() returning an object with step(dir) and state(). dir is "up", "down", "left" or "right". state() returns {snake, food, score, over}: snake is a list of [x, y] cells, head first; food is [x, y]; score is a number; over is a boolean. x is the column (0 to 9, left to right), y the row (0 to 9, top to bottom); up is y - 1.

The rules, exactly:
1. The game starts with snake [[5, 3], [5, 4], [5, 5]], moving up, food at [4, 8], score 0.
2. step(dir): if dir is the opposite of the current direction it is ignored and the snake keeps going; otherwise dir becomes the current direction. The head moves one cell that way.
3. If the new head cell holds the food, the snake grows: its tail stays. Otherwise the tail cell is freed first.
4. If the new head is off the grid or on a cell of the snake (after rule 3), the game is over: over becomes true and nothing else changes. Once over, step does nothing.
5. Eating adds 1 to the score, and the next food goes to the first empty cell in reading order (row by row from the top, left to right) after the new head's cell, wrapping from [9, 9] to [0, 0].

Output one complete HTML document and nothing else, with all CSS and JavaScript inline and nothing loaded from another site. Put the game logic, and only it, in <script id="game">: it must not touch document, window or timers, because the site runs that script on its own and plays the game through createGame(). Wire the page in another <script>.

Write a JavaScript function mergeIntervals(intervals). intervals is an array of [start, end] pairs of integers with start <= end, in any order, possibly empty. Return a new array of the merged intervals sorted by start: intervals that overlap or touch (one ends where the next starts) become one. Do not change the input array or its pairs.

mergeIntervals([[8, 10], [1, 3], [2, 6], [6, 7]]) returns [[1, 7], [8, 10]].

Reply with one ```js code block holding plain JavaScript (no imports, no exports, no DOM, no timers). The site runs it with hidden tests.

Write a JavaScript class LRUCache: a least-recently-used cache of integer keys and values.

- new LRUCache(capacity): capacity is an integer of at least 1.
- get(key) returns the value stored for key, or -1 if there is none. A get that finds the key makes it the most recently used.
- put(key, value) stores the value (replacing any value already there) and makes key the most recently used. If that leaves more than capacity keys, the least recently used key is removed.

get and put should take constant time on average.

Reply with one ```js code block holding plain JavaScript (no imports, no exports, no DOM, no timers). The site runs it with hidden tests.

Write a JavaScript function evaluate(expr) that returns the value of an arithmetic expression given as a string. The expression has non-negative integers, the operators + - * /, parentheses, unary minus (as in -3, - -3, 2 * -3 or -(1 + 2)) and spaces anywhere between tokens. * and / bind tighter than + and -, and operators of the same kind group from the left. / is integer division that truncates toward zero: 7 / 2 is 3 and -7 / 2 is -3. Dividing by zero must throw an Error. Do not use eval or Function.

evaluate("2 + 3 * (4 - 6) / 4") returns 1.

Reply with one ```js code block holding plain JavaScript (no imports, no exports, no DOM, no timers). The site runs it with hidden tests.

This JavaScript module has one bug. The occupancy report sometimes counts one booked night more than there is in the range it was asked about.

Find it and fix it without changing anything else.

```js
// Bookings for one holiday flat. A booking is { guest, checkIn, checkOut } with dates as "YYYY-MM-DD".
// A guest sleeps the nights from checkIn up to, but not including, checkOut: checkOut is the day they leave,
// and another guest may check in that same day.

function dayNumber(date) {
  const [y, m, d] = date.split('-').map(Number);
  return Date.UTC(y, m - 1, d) / 86400000;
}

function toDate(day) {
  return new Date(day * 86400000).toISOString().slice(0, 10);
}

function nights(booking) {
  return dayNumber(booking.checkOut) - dayNumber(booking.checkIn);
}

function overlaps(a, b) {
  return dayNumber(a.checkIn) < dayNumber(b.checkOut) && dayNumber(b.checkIn) < dayNumber(a.checkOut);
}

function canBook(bookings, request) {
  if (nights(request) < 1) return false;
  for (const booking of bookings) {
    if (overlaps(booking, request)) return false;
  }
  return true;
}

function isBooked(bookings, day) {
  return bookings.some((b) => dayNumber(b.checkIn) <= day && day < dayNumber(b.checkOut));
}

// The nights from `from` up to, but not including, `to` that someone has booked.
function bookedNights(bookings, from, to) {
  let count = 0;
  for (let day = dayNumber(from); day <= dayNumber(to); day++) {
    if (isBooked(bookings, day)) count++;
  }
  return count;
}

// The first night on or after `from` that nobody has booked, as "YYYY-MM-DD".
function firstFreeNight(bookings, from) {
  let day = dayNumber(from);
  while (isBooked(bookings, day)) day++;
  return toDate(day);
}

// The price in cents: Friday and Saturday nights at rates.weekend, every other night at rates.weekday.
function price(booking, rates) {
  let total = 0;
  for (let day = dayNumber(booking.checkIn); day < dayNumber(booking.checkOut); day++) {
    const weekday = new Date(day * 86400000).getUTCDay();
    total += weekday === 5 || weekday === 6 ? rates.weekend : rates.weekday;
  }
  return total;
}
```

Reply with the whole corrected module in one ```js code block, with the same function names.

This JavaScript module has one bug. A doubled quote inside a quoted field, as in "say ""hi""", does not come out as one double quote.

Find it and fix it without changing anything else.

```js
// Reads CSV the way spreadsheets write it: fields are separated by commas, a field may be wrapped in
// double quotes so it can hold commas, and "" inside a quoted field stands for one double quote.
// Fields are not trimmed. Empty lines are skipped.

function parseLine(line) {
  const fields = [];
  let field = '';
  let quoted = false;
  for (let i = 0; i < line.length; i++) {
    const ch = line[i];
    if (quoted) {
      if (ch === '"') {
        if (line[i + 1] === '"') {
          field += '"';
        } else {
          quoted = false;
        }
      } else {
        field += ch;
      }
    } else if (ch === '"') {
      quoted = true;
    } else if (ch === ',') {
      fields.push(field);
      field = '';
    } else {
      field += ch;
    }
  }
  fields.push(field);
  return fields;
}

function parseCSV(text) {
  return text.split(/\r?\n/).filter((line) => line !== '').map(parseLine);
}

// Each row after the header as an object keyed by the header's names; a missing field is ''.
function toObjects(text) {
  const [header, ...rows] = parseCSV(text);
  return rows.map((row) => {
    const record = {};
    header.forEach((name, i) => {
      record[name] = i < row.length ? row[i] : '';
    });
    return record;
  });
}

// The sum of a column's numbers; fields that are not numbers count as 0.
function sumColumn(text, name) {
  return toObjects(text).reduce((total, record) => total + (Number(record[name]) || 0), 0);
}
```

Reply with the whole corrected module in one ```js code block, with the same function names.

Write one SQLite query that answers the question below. The site runs it on its own copy of these tables, filled with rows you have not seen.

```sql
CREATE TABLE customers (id INTEGER PRIMARY KEY, name TEXT NOT NULL, city TEXT NOT NULL);
CREATE TABLE orders (id INTEGER PRIMARY KEY, customer_id INTEGER NOT NULL REFERENCES customers(id),
                     placed TEXT NOT NULL,  -- 'YYYY-MM-DD'
                     status TEXT NOT NULL); -- 'delivered', 'cancelled' or 'pending'
CREATE TABLE items (order_id INTEGER NOT NULL REFERENCES orders(id), product TEXT NOT NULL,
                    quantity INTEGER NOT NULL, price_cents INTEGER NOT NULL);  -- price_cents: for one unit
```

Question: The names of the customers with at least 2 delivered orders and no cancelled order. One column: name. In alphabetical order.

Reply with only the query, in one ```sql code block: one SELECT statement (WITH is fine), nothing that changes the database.

Five people each have one meeting today: Cleo, Dev, Fay, Gus, Noa. The five meetings are at different times, 09:00, 10:00, 11:00, 13:00, 14:00 (in that order: 10:00 is right after 09:00, 13:00 right after 11:00), and in different rooms. The list of rooms, in order: Birch, Cedar, Elm, Pine, Rowan.

1. Gus's meeting is in the slot right after Dev's.
2. Cleo meets earlier than Gus.
3. Cleo's and Gus's rooms are next to each other on the list of rooms.
4. Whoever is in Rowan meets earlier than Dev.
5. Noa is not in Rowan.
6. Dev is not in Elm.
7. Noa meets earlier than Cleo.
8. Whoever is in Cedar meets earlier than Noa.

Exactly one schedule fits every clue. Work it out, then end with exactly five lines, one per person, in this form:
Ana: 09:00, Oak

Passes when Looks up the account, opens order R-5530 (the kettle), checks north then south and stops, reserves one steel kettle at south for R-5530, opens a damage claim (a return, if tried, is refused), makes at most 10 calls, and tells the customer claim CL-2207 and that the replacement ships on 3 November, without claiming a return label.

Hi, it's ana.silva@example.com. My kettle arrived with a cracked lid. Can you sort it out?