Create 0701-insert-into-a-binary-search-tree.js

Author: aadil42

javascript/0701-insert-into-a-binary-search-tree.js

@@ -0,0 +1,31 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * h = height of the tree, could be n.
+ * Time O(h) | Space O(h)
+ * @param {TreeNode} root
+ * @param {number} val
+ * @return {TreeNode}
+ */
+var insertIntoBST = function(root, val) {
+    
+    const dfs = (root) => {
+        if(!root) {
+            return new TreeNode(val);
+        }
+        if(val > root.val) {
+            root.right = dfs(root.right);
+        }  else {
+            root.left = dfs(root.left);
+        }
+        return root;
+    }
+
+    return dfs(root);
+};