Leet Code Daily 2024-05-06 - Remove Nodes From Linked List

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode() : val(0), next(nullptr) {}
 *     ListNode(int x) : val(x), next(nullptr) {}
 *     ListNode(int x, ListNode *next) : val(x), next(next) {}
 * };
 */
class Solution {
public:
    ListNode* removeNodes(ListNode* head) {
        if (head == nullptr || head->next == nullptr) {
            return head;
        }
        head->next = removeNodes(head->next);
        return (head->val < head->next->val) ? head->next : head;
    }
};