1367 - Linked List in Binary Tree

 JAVA

class Solution {
    public boolean isSubPath(ListNode head, TreeNode root) {
        if (root == null) {
            return false;
        }
        return dfs(head, root) || isSubPath(head, root.left) || isSubPath(head, root.right);
    }

    private boolean dfs(ListNode head, TreeNode root) {
        if (head == null) {
            return true;
        }
        if (root == null || head.val != root.val) {
            return false;
        }
        return dfs(head.next, root.left) || dfs(head.next, root.right);
    }
}

C++

class Solution {
public:
    bool isSubPath(ListNode* head, TreeNode* root) {
        if (!root) {
            return false;
        }
        return dfs(head, root) || isSubPath(head, root->left) || isSubPath(head, root->right);
    }

    bool dfs(ListNode* head, TreeNode* root) {
        if (!head) {
            return true;
        }
        if (!root || head->val != root->val) {
            return false;
        }
        return dfs(head->next, root->left) || dfs(head->next, root->right);
    }
};