refactor

delight010 · delight010 · commit 7d3478771739 · 2025-08-30T12:29:15.000+09:00
diff --git a/design-add-and-search-words-data-structure/delight010.swift b/design-add-and-search-words-data-structure/delight010.swift
@@ -5,7 +5,7 @@ class WordDictionary {
         var isEndOfWord: Bool = false
     }
     
-    var root: TrieNode?
+    var root: TrieNode
 
     init() {
         root = TrieNode()
