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The journey of every round

Every round-trip in the corpus is public. Open one to see the prompt, the zero-point index, the baseline response, the enhanced response, and how each grader read the difference. Leave a comment if a grader's reading lands — or doesn't.

FilterVerdictallBetterSameWorseDomainallcsharppythonhr-lawhousing-lawmath306 rounds
#79910 May 26

Find orders where the order_date is later than the ship_date.

V1BetterV2—ΔL—csharp
#79810 May 26

Write a SQL query that returns products and their cumulative sales over time.

V1BetterV2—ΔL—csharp
#79710 May 26

Calculate a moving 7-day average of daily_sales using a window function.

V1BetterV2—ΔL—csharp
#79610 May 26

Find customers who placed orders in consecutive calendar months.

V1BetterV2—ΔL—csharp
#79510 May 26

Pivot a table of monthly_sales (month, year, total) to columns per month.

V1BetterV2—ΔL—csharp
#79410 May 26

Use ROW_NUMBER to deduplicate orders, keeping the most recent per customer.

V1BetterV2—ΔL+0.5csharp
#79310 May 26

Find duplicate rows in an emails table based on email address.

V1BetterV2—ΔL+0.5csharp
#79110 May 26

Calculate the percentage of total sales each product represents.

V1BetterV2—ΔL—csharp
#79010 May 26

Use a CTE to find the longest chain of referrals in a referrals table.

V1BetterV2—ΔL—csharp
#78910 May 26

Write a SQL query that returns customers with more than 3 orders.

V1BetterV2—ΔL—csharp
#78810 May 26

Find the second-highest salary in an employees table.

V1BetterV2—ΔL—csharp
#78710 May 26

Calculate the running total of sales by date using a window function.

V1BetterV2—ΔL—csharp
#78610 May 26

Use a window function to rank orders within each customer.

V1BetterV2—ΔL—csharp
#78510 May 26

Find products that have never been ordered using a left join.

V1BetterV2—ΔL—csharp
#77810 May 26

Convert 5 over 8 to a percentage.

V1BetterV2—ΔL—csharp
#77510 May 26

What is the next term in the sequence 2, 6, 18, 54?

V1BetterV2—ΔL—csharp
#77410 May 26

If x plus y equals 10 and x minus y equals 4, what are x and y?

V1BetterV2—ΔL—csharp
#77110 May 26

Round 4.7836 to two decimal places.

V1BetterV2—ΔL—csharp
#77010 May 26

What is 15 percent of 80?

V1BetterV2—ΔL—csharp
#76710 May 26

Express 3 over 4 as a decimal.

V1BetterV2—ΔL—csharp
#76410 May 26

What is 7 factorial (7!)?

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#76210 May 26

Convert 0.625 to a fraction in lowest terms.

V1BetterV2—ΔL—csharp
#75910 May 26

What is 144 divided by 12?

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#75610 May 26

Solve for x: 3x + 7 = 22

V1BetterV2—ΔL—csharp