Leetcode Problem 2331. Evaluate Boolean Binary Tree

2331. Evaluate Boolean Binary Tree

Leetcode Solutions

Recursive Post-order Traversal

  1. Define a recursive function dfs that takes a node as an argument.
  2. If the node is None, return False (base case for null nodes).
  3. If the node is a leaf node (no children), return True if its value is 1, otherwise return False.
  4. Recursively call dfs on the left and right children of the node to evaluate them.
  5. If the node's value is 2 (OR), return the logical OR of the left and right children's evaluations.
  6. If the node's value is 3 (AND), return the logical AND of the left and right children's evaluations.
  7. Call dfs with the root node and return its result as the final answer.
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Iterative Depth-First Search (DFS) with Stack

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