Update tree-building exercise file configuration

Jegors Cemisovs · Jegors Cemisovs · commit 851cc01674d9 · 2026-02-25T14:05:48.000+02:00
diff --git a/exercises/practice/tree-building/.meta/config.json b/exercises/practice/tree-building/.meta/config.json
@@ -11,7 +11,9 @@
   ],
   "files": {
     "solution": [
-      "src/main/java/BuildTree.java"
+      "src/main/java/Record.java",
+      "src/main/java/BuildTree.java",
+      "src/main/java/TreeNode.java"
     ],
     "test": [
       "src/test/java/BuildTreeTest.java"
