> ## Documentation Index > Fetch the complete documentation index at: https://leetcode-py.wisl.dev/llms.txt > Use this file to discover all available pages before exploring further. > ## Agent Instructions > leetcode-py is a Python LeetCode practice environment generator with one CLI: lcpy. It is not a service or platform. > Each problem is a directory under leetcode/ with README.md, solution.py, test_solution.py, helpers.py, and playground.ipynb. lcpy gen creates them from JSON templates bundled with the package. > Examples are backed by tests; copy them verbatim. # Tree in Python with Tests > All 149 Tree LeetCode problems with tested Python solutions. Tree holds 149 problems (35 Easy, 101 Medium, 13 Hard). Generate any of them into the current directory with `lcpy gen -n `.
| # | Problem | Difficulty | Solution | | - | - | - | - | | 94 | [Binary Tree Inorder Traversal](/problems/binary-tree-inorder-traversal) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_inorder_traversal/solution.py) | | 95 | [Unique Binary Search Trees II](/problems/unique-binary-search-trees-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/unique_binary_search_trees_ii/solution.py) | | 96 | [Unique Binary Search Trees](/problems/unique-binary-search-trees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/unique_binary_search_trees/solution.py) | | 98 | [Validate Binary Search Tree](/problems/validate-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/validate_binary_search_tree/solution.py) | | 99 | [Recover Binary Search Tree](/problems/recover-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/recover_binary_search_tree/solution.py) | | 100 | [Same Tree](/problems/same-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/same_tree/solution.py) | | 101 | [Symmetric Tree](/problems/symmetric-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/symmetric_tree/solution.py) | | 102 | [Binary Tree Level Order Traversal](/problems/binary-tree-level-order-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_level_order_traversal/solution.py) | | 103 | [Binary Tree Zigzag Level Order Traversal](/problems/binary-tree-zigzag-level-order-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_zigzag_level_order_traversal/solution.py) | | 104 | [Maximum Depth of Binary Tree](/problems/maximum-depth-of-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_depth_of_binary_tree/solution.py) | | 105 | [Construct Binary Tree from Preorder and Inorder Traversal](/problems/construct-binary-tree-from-preorder-and-inorder-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_binary_tree_from_preorder_and_inorder_traversal/solution.py) | | 106 | [Construct Binary Tree from Inorder and Postorder Traversal](/problems/construct-binary-tree-from-inorder-and-postorder-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_binary_tree_from_inorder_and_postorder_traversal/solution.py) | | 107 | [Binary Tree Level Order Traversal II](/problems/binary-tree-level-order-traversal-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_level_order_traversal_ii/solution.py) | | 108 | [Convert Sorted Array to Binary Search Tree](/problems/convert-sorted-array-to-binary-search-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/convert_sorted_array_to_binary_search_tree/solution.py) | | 109 | [Convert Sorted List to Binary Search Tree](/problems/convert-sorted-list-to-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/convert_sorted_list_to_binary_search_tree/solution.py) | | 110 | [Balanced Binary Tree](/problems/balanced-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/balanced_binary_tree/solution.py) | | 111 | [Minimum Depth of Binary Tree](/problems/minimum-depth-of-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/minimum_depth_of_binary_tree/solution.py) | | 112 | [Path Sum](/problems/path-sum) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/path_sum/solution.py) | | 113 | [Path Sum II](/problems/path-sum-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/path_sum_ii/solution.py) | | 114 | [Flatten Binary Tree to Linked List](/problems/flatten-binary-tree-to-linked-list) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/flatten_binary_tree_to_linked_list/solution.py) | | 116 | [Populating Next Right Pointers In Each Node](/problems/populating-next-right-pointers-in-each-node) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/populating_next_right_pointers_in_each_node/solution.py) | | 117 | [Populating Next Right Pointers in Each Node II](/problems/populating-next-right-pointers-in-each-node-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/populating_next_right_pointers_in_each_node_ii/solution.py) | | 124 | [Binary Tree Maximum Path Sum](/problems/binary-tree-maximum-path-sum) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_maximum_path_sum/solution.py) | | 129 | [Sum Root to Leaf Numbers](/problems/sum-root-to-leaf-numbers) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/sum_root_to_leaf_numbers/solution.py) | | 144 | [Binary Tree Preorder Traversal](/problems/binary-tree-preorder-traversal) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_preorder_traversal/solution.py) | | 145 | [Binary Tree Postorder Traversal](/problems/binary-tree-postorder-traversal) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_postorder_traversal/solution.py) | | 156 | [Binary Tree Upside Down](/problems/binary-tree-upside-down) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_upside_down/solution.py) | | 173 | [Binary Search Tree Iterator](/problems/binary-search-tree-iterator) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_search_tree_iterator/solution.py) | | 199 | [Binary Tree Right Side View](/problems/binary-tree-right-side-view) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_right_side_view/solution.py) | | 222 | [Count Complete Tree Nodes](/problems/count-complete-tree-nodes) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/count_complete_tree_nodes/solution.py) | | 226 | [Invert Binary Tree](/problems/invert-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/invert_binary_tree/solution.py) | | 230 | [Kth Smallest Element in a BST](/problems/kth-smallest-element-in-a-bst) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/kth_smallest_element_in_a_bst/solution.py) | | 235 | [Lowest Common Ancestor of a Binary Search Tree](/problems/lowest-common-ancestor-of-a-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/lowest_common_ancestor_of_a_binary_search_tree/solution.py) | | 236 | [Lowest Common Ancestor of a Binary Tree](/problems/lowest-common-ancestor-of-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/lowest_common_ancestor_of_a_binary_tree/solution.py) | | 250 | [Count Univalue Subtrees](/problems/count-univalue-subtrees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/count_univalue_subtrees/solution.py) | | 255 | [Verify Preorder Sequence in Binary Search Tree](/problems/verify-preorder-sequence-in-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/verify_preorder_sequence_in_binary_search_tree/solution.py) | | 257 | [Binary Tree Paths](/problems/binary-tree-paths) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_paths/solution.py) | | 270 | [Closest Binary Search Tree Value](/problems/closest-bst-value) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/closest_bst_value/solution.py) | | 272 | [Closest Binary Search Tree Value II](/problems/closest-bst-value-ii) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/closest_bst_value_ii/solution.py) | | 285 | [Inorder Successor in BST](/problems/inorder-successor-in-bst) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/inorder_successor_in_bst/solution.py) | | 297 | [Serialize and Deserialize Binary Tree](/problems/serialize-and-deserialize-binary-tree) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/serialize_and_deserialize_binary_tree/solution.py) | | 298 | [Binary Tree Longest Consecutive Sequence](/problems/binary-tree-longest-consecutive-sequence) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_longest_consecutive_sequence/solution.py) | | 314 | [Binary Tree Vertical Order Traversal](/problems/binary-tree-vertical-order-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_vertical_order_traversal/solution.py) | | 331 | [Verify Preorder Serialization of a Binary Tree](/problems/verify-preorder-serialization-of-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/verify_preorder_serialization_of_a_binary_tree/solution.py) | | 333 | [Largest BST Subtree](/problems/largest-bst-subtree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/largest_bst_subtree/solution.py) | | 337 | [House Robber III](/problems/house-robber-iii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/house_robber_iii/solution.py) | | 341 | [Flatten Nested List Iterator](/problems/flatten-nested-list-iterator) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/flatten_nested_list_iterator/solution.py) | | 366 | [Find Leaves of Binary Tree](/problems/find-leaves-of-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_leaves_of_binary_tree/solution.py) | | 404 | [Sum of Left Leaves](/problems/sum-of-left-leaves) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/sum_of_left_leaves/solution.py) | | 426 | [Convert Binary Search Tree to Sorted Doubly Linked List](/problems/convert-binary-search-tree-to-sorted-doubly-linked-list) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/convert_binary_search_tree_to_sorted_doubly_linked_list/solution.py) | | 427 | [Construct Quad Tree](/problems/construct-quad-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_quad_tree/solution.py) | | 428 | [Serialize and Deserialize N-ary Tree](/problems/serialize-and-deserialize-n-ary-tree) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/serialize_and_deserialize_n_ary_tree/solution.py) | | 429 | [N-ary Tree Level Order Traversal](/problems/n-ary-tree-level-order-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/n_ary_tree_level_order_traversal/solution.py) | | 431 | [Encode N-ary Tree to Binary Tree](/problems/encode-n-ary-tree-to-binary-tree) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/encode_n_ary_tree_to_binary_tree/solution.py) | | 437 | [Path Sum III](/problems/path-sum-iii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/path_sum_iii/solution.py) | | 449 | [Serialize and Deserialize BST](/problems/serialize-and-deserialize-bst) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/serialize_and_deserialize_bst/solution.py) | | 450 | [Delete Node in a BST](/problems/delete-node-in-a-bst) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/delete_node_in_a_bst/solution.py) | | 501 | [Find Mode in Binary Search Tree](/problems/find-mode-in-binary-search-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_mode_in_binary_search_tree/solution.py) | | 508 | [Most Frequent Subtree Sum](/problems/most-frequent-subtree-sum) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/most_frequent_subtree_sum/solution.py) | | 510 | [Inorder Successor in BST II](/problems/inorder-successor-in-bst-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/inorder_successor_in_bst_ii/solution.py) | | 513 | [Find Bottom Left Tree Value](/problems/find-bottom-left-tree-value) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_bottom_left_tree_value/solution.py) | | 515 | [Find Largest Value in Each Tree Row](/problems/find-largest-value-in-each-tree-row) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_largest_value_in_each_tree_row/solution.py) | | 530 | [Minimum Absolute Difference in BST](/problems/minimum-absolute-difference-in-bst) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/minimum_absolute_difference_in_bst/solution.py) | | 536 | [Construct Binary Tree from String](/problems/construct-binary-tree-from-string) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_binary_tree_from_string/solution.py) | | 538 | [Convert BST to Greater Tree](/problems/convert-bst-to-greater-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/convert_bst_to_greater_tree/solution.py) | | 543 | [Diameter of Binary Tree](/problems/diameter-of-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/diameter_of_binary_tree/solution.py) | | 545 | [Boundary of Binary Tree](/problems/boundary-of-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/boundary_of_binary_tree/solution.py) | | 549 | [Binary Tree Longest Consecutive Sequence II](/problems/binary-tree-longest-consecutive-sequence-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_longest_consecutive_sequence_ii/solution.py) | | 558 | [Logical OR of Two Binary Grids Represented as Quad-Trees](/problems/logical-or-of-two-binary-grids-represented-as-quad-trees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/logical_or_of_two_binary_grids_represented_as_quad_trees/solution.py) | | 559 | [Maximum Depth of N-ary Tree](/problems/maximum-depth-of-n-ary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_depth_of_n_ary_tree/solution.py) | | 563 | [Binary Tree Tilt](/problems/binary-tree-tilt) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_tilt/solution.py) | | 572 | [Subtree of Another Tree](/problems/subtree-of-another-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/subtree_of_another_tree/solution.py) | | 582 | [Kill Process](/problems/kill-process) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/kill_process/solution.py) | | 589 | [N-ary Tree Preorder Traversal](/problems/n-ary-tree-preorder-traversal) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/n_ary_tree_preorder_traversal/solution.py) | | 590 | [N-ary Tree Postorder Traversal](/problems/n-ary-tree-postorder-traversal) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/n_ary_tree_postorder_traversal/solution.py) | | 606 | [Construct String from Binary Tree](/problems/construct-string-from-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_string_from_binary_tree/solution.py) | | 617 | [Merge Two Binary Trees](/problems/merge-two-binary-trees) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/merge_two_binary_trees/solution.py) | | 623 | [Add One Row to Tree](/problems/add-one-row-to-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/add_one_row_to_tree/solution.py) | | 637 | [Average of Levels in Binary Tree](/problems/average-of-levels-in-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/average_of_levels_in_binary_tree/solution.py) | | 652 | [Find Duplicate Subtrees](/problems/find-duplicate-subtrees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_duplicate_subtrees/solution.py) | | 653 | [Two Sum IV - Input is a BST](/problems/two-sum-iv-input-is-a-bst) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/two_sum_iv_input_is_a_bst/solution.py) | | 654 | [Maximum Binary Tree](/problems/maximum-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_binary_tree/solution.py) | | 655 | [Print Binary Tree](/problems/print-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/print_binary_tree/solution.py) | | 662 | [Maximum Width of Binary Tree](/problems/maximum-width-of-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_width_of_binary_tree/solution.py) | | 663 | [Equal Tree Partition](/problems/equal-tree-partition) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/equal_tree_partition/solution.py) | | 666 | [Path Sum IV](/problems/path-sum-iv) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/path_sum_iv/solution.py) | | 669 | [Trim a Binary Search Tree](/problems/trim-a-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/trim_a_binary_search_tree/solution.py) | | 671 | [Second Minimum Node In a Binary Tree](/problems/second-minimum-node-in-a-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/second_minimum_node_in_a_binary_tree/solution.py) | | 687 | [Longest Univalue Path](/problems/longest-univalue-path) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/longest_univalue_path/solution.py) | | 690 | [Employee Importance](/problems/employee-importance) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/employee_importance/solution.py) | | 700 | [Search in a Binary Search Tree](/problems/search-in-a-binary-search-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/search_in_a_binary_search_tree/solution.py) | | 701 | [Insert into a Binary Search Tree](/problems/insert-into-a-binary-search-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/insert_into_a_binary_search_tree/solution.py) | | 703 | [Kth Largest Element in a Stream](/problems/kth-largest-element-in-a-stream) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/kth_largest_element_in_a_stream/solution.py) | | 742 | [Closest Leaf in a Binary Tree](/problems/closest-leaf-in-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/closest_leaf_in_a_binary_tree/solution.py) | | 776 | [Split BST](/problems/split-bst) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/split_bst/solution.py) | | 783 | [Minimum Distance Between BST Nodes](/problems/min-distance-in-bst) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/min_distance_in_bst/solution.py) | | 814 | [Binary Tree Pruning](/problems/binary-tree-pruning) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_pruning/solution.py) | | 834 | [Sum of Distances in Tree](/problems/sum-of-distances-in-tree) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/sum_of_distances_in_tree/solution.py) | | 863 | [All Nodes Distance K in Binary Tree](/problems/all-nodes-distance-k-in-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/all_nodes_distance_k_in_binary_tree/solution.py) | | 865 | [Smallest Subtree with all the Deepest Nodes](/problems/smallest-subtree-with-all-the-deepest-nodes) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/smallest_subtree_with_all_the_deepest_nodes/solution.py) | | 872 | [Leaf-Similar Trees](/problems/leaf-similar-trees) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/leaf_similar_trees/solution.py) | | 889 | [Construct Binary Tree from Preorder and Postorder Traversal](/problems/construct-binary-tree-from-preorder-and-postorder-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/construct_binary_tree_from_preorder_and_postorder_traversal/solution.py) | | 894 | [All Possible Full Binary Trees](/problems/all-possible-full-binary-trees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/all_possible_full_binary_trees/solution.py) | | 897 | [Increasing Order Search Tree](/problems/increasing-order-search-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/increasing_order_search_tree/solution.py) | | 919 | [Complete Binary Tree Inserter](/problems/complete-binary-tree-inserter) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/complete_binary_tree_inserter/solution.py) | | 938 | [Range Sum of BST](/problems/range-sum-of-bst) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/range_sum_of_bst/solution.py) | | 951 | [Flip Equivalent Binary Trees](/problems/flip-equivalent-binary-trees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/flip_equivalent_binary_trees/solution.py) | | 958 | [Check Completeness of a Binary Tree](/problems/check-completeness-of-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/check_completeness_of_a_binary_tree/solution.py) | | 965 | [Univalued Binary Tree](/problems/univalued-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/univalued_binary_tree/solution.py) | | 968 | [Binary Tree Cameras](/problems/binary-tree-cameras) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/binary_tree_cameras/solution.py) | | 971 | [Flip Binary Tree To Match Preorder Traversal](/problems/flip-binary-tree-to-match-preorder-traversal) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/flip_binary_tree_to_match_preorder_traversal/solution.py) | | 979 | [Distribute Coins in Binary Tree](/problems/distribute-coins-in-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/distribute_coins_in_binary_tree/solution.py) | | 987 | [Vertical Order Traversal of a Binary Tree](/problems/vertical-order-traversal-of-a-binary-tree) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/vertical_order_traversal_of_a_binary_tree/solution.py) | | 988 | [Smallest String Starting From Leaf](/problems/smallest-string-starting-from-leaf) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/smallest_string_starting_from_leaf/solution.py) | | 993 | [Cousins in Binary Tree](/problems/cousins-in-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/cousins_in_binary_tree/solution.py) | | 998 | [Maximum Binary Tree II](/problems/maximum-binary-tree-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_binary_tree_ii/solution.py) | | 1028 | [Recover a Tree From Preorder Traversal](/problems/recover-a-tree-from-preorder-traversal) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/recover_a_tree_from_preorder_traversal/solution.py) | | 1110 | [Delete Nodes And Return Forest](/problems/delete-nodes-and-return-forest) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/delete_nodes_and_return_forest/solution.py) | | 1120 | [Maximum Average Subtree](/problems/maximum-average-subtree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_average_subtree/solution.py) | | 1214 | [Two Sum BSTs](/problems/two-sum-bsts) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/two_sum_bsts/solution.py) | | 1245 | [Tree Diameter](/problems/tree-diameter) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/tree_diameter/solution.py) | | 1273 | [Delete Tree Nodes](/problems/delete-tree-nodes) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/delete_tree_nodes/solution.py) | | 1325 | [Delete Leaves With a Given Value](/problems/delete-leaves-with-a-given-value) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/delete_leaves_with_a_given_value/solution.py) | | 1361 | [Validate Binary Tree Nodes](/problems/validate-binary-tree-nodes) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/validate_binary_tree_nodes/solution.py) | | 1367 | [Linked List in Binary Tree](/problems/linked-list-in-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/linked_list_in_binary_tree/solution.py) | | 1376 | [Time Needed to Inform All Employees](/problems/time-needed-to-inform-all-employees) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/time_needed_to_inform_all_employees/solution.py) | | 1443 | [Minimum Time to Collect All Apples in a Tree](/problems/minimum-time-to-collect-all-apples-in-a-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/minimum_time_to_collect_all_apples_in_a_tree/solution.py) | | 1448 | [Count Good Nodes in Binary Tree](/problems/count-good-nodes-in-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/count_good_nodes_in_binary_tree/solution.py) | | 1457 | [Pseudo-Palindromic Paths in a Binary Tree](/problems/pseudo-palindromic-paths-in-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/pseudo_palindromic_paths_in_a_binary_tree/solution.py) | | 1490 | [Clone N-ary Tree](/problems/clone-n-ary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/clone_n_ary_tree/solution.py) | | 1506 | [Find Root of N-Ary Tree](/problems/find-root-of-n-ary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_root_of_n_ary_tree/solution.py) | | 1522 | [Diameter of N-Ary Tree](/problems/diameter-of-n-ary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/diameter_of_n_ary_tree/solution.py) | | 1530 | [Number of Good Leaf Nodes Pairs](/problems/number-of-good-leaf-nodes-pairs) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/number_of_good_leaf_nodes_pairs/solution.py) | | 1609 | [Even Odd Tree](/problems/even-odd-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/even_odd_tree/solution.py) | | 1650 | [Lowest Common Ancestor of a Binary Tree III](/problems/lowest-common-ancestor-of-a-binary-tree-iii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/lowest_common_ancestor_of_a_binary_tree_iii/solution.py) | | 1993 | [Operations on Tree](/problems/operations-on-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/operations_on_tree/solution.py) | | 2096 | [Step-By-Step Directions From a Binary Tree Node to Another](/problems/step-by-step-directions-from-a-binary-tree-node-to-another) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/step_by_step_directions_from_a_binary_tree_node_to_another/solution.py) | | 2196 | [Create Binary Tree From Descriptions](/problems/create-binary-tree-from-descriptions) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/create_binary_tree_from_descriptions/solution.py) | | 2331 | [Evaluate Boolean Binary Tree](/problems/evaluate-boolean-binary-tree) | Easy | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/evaluate_boolean_binary_tree/solution.py) | | 2415 | [Reverse Odd Levels of Binary Tree](/problems/reverse-odd-levels-of-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/reverse_odd_levels_of_binary_tree/solution.py) | | 2421 | [Number of Good Paths](/problems/number-of-good-paths) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/number_of_good_paths/solution.py) | | 2467 | [Most Profitable Path in a Tree](/problems/most-profitable-path-in-a-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/most_profitable_path_in_a_tree/solution.py) | | 2471 | [Minimum Number of Operations to Sort a Binary Tree by Level](/problems/minimum-operations-to-sort-a-binary-tree-by-level) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/minimum_operations_to_sort_a_binary_tree_by_level/solution.py) | | 2477 | [Minimum Fuel Cost to Report to the Capital](/problems/minimum-fuel-cost-to-report-to-the-capital) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/minimum_fuel_cost_to_report_to_the_capital/solution.py) | | 2583 | [Kth Largest Sum in a Binary Tree](/problems/kth-largest-sum-in-a-binary-tree) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/kth_largest_sum_in_a_binary_tree/solution.py) | | 2641 | [Cousins in Binary Tree II](/problems/cousins-in-binary-tree-ii) | Medium | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/cousins_in_binary_tree_ii/solution.py) | | 2872 | [Maximum Number of K-Divisible Components](/problems/maximum-number-of-k-divisible-components) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/maximum_number_of_k_divisible_components/solution.py) | | 3068 | [Find the Maximum Sum of Node Values](/problems/find-the-maximum-sum-of-node-values) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_the_maximum_sum_of_node_values/solution.py) | | 3203 | [Find Minimum Diameter After Merging Two Trees](/problems/find-minimum-diameter-after-merging-two-trees) | Hard | [solution.py](https://github.com/wislertt/leetcode-py/blob/main/leetcode/find_minimum_diameter_after_merging_two_trees/solution.py) |
This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.