Package g0801_0900.s0863_all_nodes_distance_k_in_binary_tree

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    863 - All Nodes Distance K in Binary Tree.

    Medium

    Given the root of a binary tree, the value of a target node target, and an integer k, return an array of the values of all nodes that have a distance k from the target node.

    You can return the answer in any order.

    Example 1:

    Input: root = 3,5,1,6,2,0,8,null,null,7,4, target = 5, k = 2

    Output: 7,4,1 Explanation: The nodes that are a distance 2 from the target node (with value 5) have values 7, 4, and 1.

    Example 2:

    Input: root = 1, target = 1, k = 3

    Output: []

    Constraints:

    • The number of nodes in the tree is in the range [1, 500].

    • 0 <= Node.val <= 500

    • All the values Node.val are unique.

    • target is the value of one of the nodes in the tree.

    • 0 <= k <= 1000

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final List<Integer> distanceK(TreeNode root, TreeNode target, Integer k)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait