| | | 1 | | // -------------------------------------------------------------------------------- |
| | | 2 | | // Copyright (C) 2025 Eugene Eremeev (also known as Yevhenii Yeriemeieiv). |
| | | 3 | | // All Rights Reserved. |
| | | 4 | | // -------------------------------------------------------------------------------- |
| | | 5 | | // This software is the confidential and proprietary information of Eugene Eremeev |
| | | 6 | | // (also known as Yevhenii Yeriemeieiv) ("Confidential Information"). You shall not |
| | | 7 | | // disclose such Confidential Information and shall use it only in accordance with |
| | | 8 | | // the terms of the license agreement you entered into with Eugene Eremeev (also |
| | | 9 | | // known as Yevhenii Yeriemeieiv). |
| | | 10 | | // -------------------------------------------------------------------------------- |
| | | 11 | | |
| | | 12 | | using LeetCode.Core.Models; |
| | | 13 | | |
| | | 14 | | namespace LeetCode.Algorithms.DeleteLeavesWithGivenValue; |
| | | 15 | | |
| | | 16 | | /// <inheritdoc /> |
| | | 17 | | public class DeleteLeavesWithGivenValueDepthFirstSearch : IDeleteLeavesWithGivenValue |
| | | 18 | | { |
| | | 19 | | /// <summary> |
| | | 20 | | /// Time complexity - O(n) |
| | | 21 | | /// Space complexity - O(n) for the skewed tree, O(log n) for a balanced tree |
| | | 22 | | /// </summary> |
| | | 23 | | /// <param name="root"></param> |
| | | 24 | | /// <param name="target"></param> |
| | | 25 | | /// <returns></returns> |
| | | 26 | | public TreeNode? RemoveLeafNodes(TreeNode? root, int target) |
| | 67 | 27 | | { |
| | 67 | 28 | | if (root == null) |
| | 36 | 29 | | { |
| | 36 | 30 | | return null; |
| | | 31 | | } |
| | | 32 | | |
| | 31 | 33 | | root.left = RemoveLeafNodes(root.left, target); |
| | 31 | 34 | | root.right = RemoveLeafNodes(root.right, target); |
| | | 35 | | |
| | 31 | 36 | | if (root.left == null && root.right == null) |
| | 22 | 37 | | { |
| | 22 | 38 | | return root.val == target ? null : root; |
| | | 39 | | } |
| | | 40 | | |
| | 9 | 41 | | return root; |
| | 67 | 42 | | } |
| | | 43 | | } |