Package g1301_1400.s1325_delete_leaves_with_a_given_value

Class Solution

java.lang.Object
g1301_1400.s1325_delete_leaves_with_a_given_value.Solution
public class Solution extends java.lang.Object
1325 - Delete Leaves With a Given Value.

Medium

Given a binary tree root and an integer target, delete all the leaf nodes with value target.

Note that once you delete a leaf node with value target ** , ** if its parent node becomes a leaf node and has the value target, it should also be deleted (you need to continue doing that until you cannot).

Example 1:

Input: root = [1,2,3,2,null,2,4], target = 2

Output: [1,null,3,null,4]

Explanation: Leaf nodes in green with value (target = 2) are removed (Picture in left). After removing, new nodes become leaf nodes with value (target = 2) (Picture in center).

Example 2:

Input: root = [1,3,3,3,2], target = 3

Output: [1,3,null,null,2]

Example 3:

Input: root = [1,2,null,2,null,2], target = 2

Output: [1]

Explanation: Leaf nodes in green with value (target = 2) are removed at each step.

Constraints:

  • The number of nodes in the tree is in the range [1, 3000].
  • 1 <= Node.val, target <= 1000

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    TreeNode
    removeLeafNodes(TreeNode root, int target)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • removeLeafNodes

      public TreeNode removeLeafNodes(TreeNode root, int target)