Coding-Medium-Tree-Height

The model receives the prompt (and optional system message). The run uses scorer javascript_function_tests with the JSON configuration below. Pass/fail and partial credit are determined entirely by that scorer against the model output; no human grading.

Return JSON only with a string field named code. The code must be dependency-free JavaScript, define the requested function in the top level or module.exports, and include no markdown, imports, require, timers, network, filesystem, eval, or placeholders.

Implement function treeHeight(root). The root parameter is either null or an object with a numeric val field and optional left and right child nodes of the same shape. Return the maximum depth of the tree: null returns 0, a single node returns 1.

Your JSON must look like {"code":"function treeHeight(...) { ... }"}.

{
  "function_name": "treeHeight",
  "timeout_ms": 100,
  "test_pass_threshold": 1,
  "partial_credit_threshold": 0.5,
  "tests": "[hidden executable tests]"
}