關於「NIL algorithm」標籤，搜尋引擎有相關的訊息討論：

What is the purpose of using NIL for representing null nodes?cs.stackexchange.com › questions › what-is-the-purpose-of...About On3 NIL Valuation, Roster Value and NILwww.on3.com › nil › news › about-on3-nil-valuation-per-post-valueobjective c - What describes nil best? What's t