create: 0701-insert-into-a-binary-search-tree.ts

jelonmusk · Jun 19, 2023 · 7de5392 · 7de5392
1 parent 914ca1f
commit 7de5392
Showing 1 changed file with 28 additions and 0 deletions.
diff --git a/typescript/0701-insert-into-a-binary-search-tree.ts b/typescript/0701-insert-into-a-binary-search-tree.ts
@@ -0,0 +1,28 @@
+/**
+ * Definition for a binary tree node.
+ * class TreeNode {
+ * val: number
+ * left: TreeNode | null
+ * right: TreeNode | null
+ * constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {
+ * this.val = (val===undefined ? 0 : val)
+ * this.left = (left===undefined ? null : left)
+ * this.right = (right===undefined ? null : right)
+ * }
+ * }
+ */
+
+function insertIntoBST(root: TreeNode | null, val: number): TreeNode | null {
+ if (!root) {
+ return new TreeNode(val);
+ }
+
+ if (val > root.val) {
+ root.right = insertIntoBST(root.right, val);
+ }
+ if (val < root.val) {
+ root.left = insertIntoBST(root.left, val);
+ }
+
+ return root;
+}