Round #872
11 May 2026, 09:54· csharp· Meta-Llama-3.3-70B-Instruct· r15-firing-v3
- Complexity
- band 1
- ZP / UO / OBS
- 3 / 0 / 10
- Journey weight
- 977
- Lightshift ΔL
- —
Prompt
Write a switch expression that maps an int status code (200, 301, 404, 500) to a string label. Use the 'when' clause for the 5xx range.
Zero-point index (what the engine surfaced)
ZPI-ZPI-0004 | 2026-05-11T09:54:23Z
Write a switch expression that maps an int status code (200, 301, 404, 500) to a string label. Use the 'when' clause for the 5xx range.
ZERO POINT — 3 entries (structural invariants)
● hsl(7.18, 100%, 50%) class [feature]
● hsl(0.00, 100%, 50%) public [feature]
● hsl(84.10, 100%, 50%) namespace [feature]
UNOBSERVED — 0 entries (implied truths)
OBSERVED — 10 entries (explicit in request)
◉ hsl(34.87, 100%, 15%) switch [feature]
◉ hsl(113.85, 100%, 15%) int [feature]
◉ hsl(133.33, 100%, 15%) string [feature]
◉ hsl(142.56, 100%, 15%) Range [feature]
◉ hsl(215.38, 100%, 15%) switch [feature]
◉ hsl(248.21, 100%, 15%) Switch expression [feature]
◉ hsl(249.23, 100%, 22%) With expression [feature]
◉ hsl(256.41, 100%, 15%) Range expression [feature]
◉ hsl(264.62, 100%, 22%) is expression [feature]
◉ hsl(265.64, 100%, 22%) as expression [feature]
COMPLEXITY │ 13 entries │ spread: 231° │ band: MEDIUM
Baseline response (no ZPI)
```csharp
public static string GetStatusLabel(int statusCode) => statusCode switch
{
200 => "OK",
301 => "Moved Permanently",
404 => "Not Found",
_ when (statusCode >= 500 && statusCode < 600) => "Internal Server Error",
_ => "Unknown Status Code"
};
```
In this code:
- We define a method `GetStatusLabel` that takes an integer `statusCode` as input.
- We use a switch expression to map the `statusCode` to a string label.
- For the 5xx range, we use the `when` clause to match any status code between 500 and 599.
- If the status code does not match any of the specified cases, we return "Unknown Status Code".
Example usage:
```csharp
public static void Main()
{
Console.WriteLine(GetStatusLabel(200)); // Outputs: OK
Console.WriteLine(GetStatusLabel(301)); // Outputs: Moved Permanently
Console.WriteLine(GetStatusLabel(404)); // Outputs: Not Found
Console.WriteLine(GetStatusLabel(500)); // Outputs: Internal Server Error
Console.WriteLine(GetStatusLabel(501)); // Outputs: Internal Server Error
Console.WriteLine(GetStatusLabel(999)); // Outputs: Unknown Status Code
}
```
Enhanced response (with ZPI)
```csharp
int statusCode = 500;
string label = statusCode switch
{
200 => "OK",
301 => "Moved Permanently",
404 => "Not Found",
_ when statusCode >= 500 && statusCode < 600 => "Server Error",
_ => "Unknown Status Code"
};
```
Grader chain
Each grader reads the same baseline + enhanced pair and casts an independent verdict. Disagreement is the framework's own signal — not noise to be averaged away.
V1samba/Meta-Llama-3.3-70B-Instruct
WorseV4qwen2.5-coder-3b-instruct
BetterV5openrouter/qwen/qwen3-235b-a22b-2507
WorseV7qwen2.5-coder-7b-instruct
SameV8openai/gpt-4.1
WorseV9anthropic/claude-opus-4-7
BetterV12openai/gpt-4o
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