Delete Node in a Linked List in O(1)

// problem url: https://leetcode.com/problems/4sum/
// mode: Medium
// Replacing the node's value with the next nodes value. ** Doesn't actually deletes the node, rather the node is removed from the list **

class Solution {
public:
    void deleteNode(ListNode* node) {
        node->val = node->next->val;
        node->next = node->next->next;
    }
};