LeetCode, Hard (Acceptance 24%, Latest): 2867. Count Valid Paths in a Tree. DFS. O(n). Swift.

1. 1Define the tree structure and initialize variables to track visited nodes and count valid paths
2. 2Implement a DFS function to traverse the tree recursively, exploring all possible paths from each node
3. 3Apply base cases to handle leaf nodes and invalid paths, ensuring accurate counting of valid paths
4. 4Configure the DFS function to update the count of valid paths based on node connections and traversal results
5. 5Test the solution with sample inputs to verify correctness and optimize performance if necessary

This solution benefits backend engineers, algorithm specialists, and software engineers working with graph and tree data structures, as it enhances their problem-solving skills and ability to optimize code for complex tree traversals

💡 Utilize Depth-First Search (DFS) to efficiently count valid paths in a tree, leveraging recursive traversal and base case handling for optimal results

Solve tree path counting problems efficiently with DFS in Swift! #algorithm #swift #tree