Leetcode Problem 965. Univalued Binary Tree

965. Univalued Binary Tree

Leetcode Solutions

Recursive Approach to Check Uni-valued Binary Tree

  1. Define a helper function isUniValued that takes a node and the value to compare against.
  2. If the node is null, return true as a null node does not violate the uni-valued property.
  3. Check if the node's value is not equal to the value we are comparing against; if so, return false.
  4. Recursively call isUniValued for the left and right children of the current node, passing the current node's value for comparison.
  5. Return true if both recursive calls for the children return true, otherwise return false.
  6. For the main function, call the helper function with the root node and its value.
UML Thumbnail

Iterative Approach using Breadth-First Search

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