{"id":"build-tree-levelorder-serialization","text":"`build_tree` constructs trees level-by-level using a queue, matching LeetCode's standard level-order serialization format where `None` marks absent nodes.","truth_value":"IN","source":"entries/2026/06/06/find-all-the-lonely-nodes-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"build-tree-levelorder-serialization","truth_value":"IN","reason":"premise"}]}}