Binary Search Tree (16 completed) Back to top # Title Level Cats Solution Languages Date Complete 98 Validate Binary Search Tree Medium B75, N150 solution c Jun 23, 2024 173 Binary Search Tree Iterator Medium solution py Jun 26, 2024 230 Kth Smallest Element in a BST Medium B75, N150 solution py Jun 29, 2024 235 Lowest Common Ancestor of a Binary Search Tree Medium B75, N150 solution py Jul 04, 2024 272 Closest Binary Search Tree Value II Hard solution py Jul 01, 2024 426 Convert Binary Search Tree to Sorted Doubly Linked List Medium solution py Jun 12, 2024 450 Delete Node in a BST Medium solution py Jun 29, 2024 653 Two Sum IV - Input is a BST Easy solution py Jul 31, 2024 700 Search in a Binary Search Tree Easy solution c, java, py Jul 17, 2024 703 Kth Largest Element in a Stream Easy Daily, N150 solution py Jul 05, 2024 776 Split BST Medium Weekly Premium solution py Jun 29, 2024 938 Range Sum of BST Easy solution js, py Jul 26, 2024 1008 Construct Binary Search Tree from Preorder Traversal Medium solution c, cpp, java Jun 27, 2024 1038 Binary Search Tree to Greater Sum Tree Medium Daily solution c Jun 26, 2024 1305 All Elements in Two Binary Search Trees Medium solution java Jun 24, 2024 1382 Balance a Binary Search Tree Medium solution py Jun 29, 2024