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 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 and Description
Solution()

Method Summary

Modifier and Type	Method and 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 Detail

Solution

public Solution()

Method Detail

removeLeafNodes

public TreeNode removeLeafNodes(TreeNode root,
                                int target)