LeetCode Daily: Linked List in Binary Tree Solution in Java | September 7, 2024

🔍 LeetCode Problem of the Day: Linked List in Binary Tree

In today's LeetCode daily challenge, we solve the problem of checking whether a linked list exists as a subpath in a binary tree. This solution uses recursive traversal in Java.

👉 Solution: Pinned on the comments

🌟 Problem Description:
Given the head of a linked list and the root of a binary tree, check if the linked list appears as a downward path in the binary tree. The path does not need to start at the root of the tree.

🔑 Key Points:
Recursive Approach: We use a recursive helper function to match the values of the linked list and the binary tree node by node.
Multiple Subtree Checks: The isSubPath method checks for the path starting at the root and then recursively checks the left and right subtrees.
Base Conditions: We handle the base cases where the list is fully matched or the binary tree traversal ends.

📝 Code Explanation:
Helper Function: The helper function recursively checks if the current node in the linked list matches the current node in the binary tree and proceeds to check the child nodes.
Tree Traversal: The isSubPath method initiates the traversal and calls the helper function at each node of the binary tree.
Recursive Matching: If a match is found for the current linked list node, we proceed to the child nodes of the binary tree to continue matching.

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