Leetcode Problem 1325. Delete Leaves With a Given Value

1325. Delete Leaves With a Given Value

Leetcode Solutions

Post-order Traversal Recursive Approach

  1. Define a recursive function removeLeafNodes that takes a TreeNode and the target value as arguments.
  2. If the current node is null, return null.
  3. Recursively call removeLeafNodes on the left and right children of the current node.
  4. After the recursive calls, check if the current node is a leaf (both children are null) and if its value equals the target.
  5. If the current node is a leaf with the target value, return null to delete it.
  6. Otherwise, return the current node as it is not a leaf or does not have the target value.
  7. The initial call to removeLeafNodes is made with the root of the tree.
UML Thumbnail

Iterative Depth-First Search with Parent Tracking

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