How do I delete highest elements from the list

#include <iostream>
using namespace std;
 
/* Link list node */
struct Node {
   int data;
   struct Node* next;
   };
 
//delete first node in the linked list
Node* deleteFirstNode(struct Node* head)
{
   if (head == NULL)
   return NULL;
 
   // Move the head pointer to the next node
   Node* tempNode = head;
   head = head->next;
   delete tempNode;
 
   return head;
}
//delete last node from linked list
Node* removeLastNode(struct Node* head)
{
   if (head == NULL)
   return NULL;
 
   if (head->next == NULL) {
      delete head;
      return NULL;
   }
 
// first find second last node
Node* second_last = head;
while (second_last->next->next != NULL)
second_last = second_last->next;
 
// Delete the last node
delete (second_last->next);
 
// set next of second_last to null
second_last->next = NULL;
 
return head;
}
 
// create linked list by adding nodes at head
void push(struct Node** head, int new_data)
{
   struct Node* newNode = new Node;
   newNode->data = new_data;
   newNode->next = (*head);
   (*head) = newNode;
}
 
// main function
int main()
{
   /* Start with the empty list */
   Node* head = NULL;
 
   // create linked list
   push(&head, 2);
   push(&head, 4);
   push(&head, 6);
   push(&head, 8);
   push(&head, 10);
 
         Node* temp;
 
   cout<<"Linked list created "<<endl; for (temp = head; temp != NULL; temp = temp->next)
   cout << temp->data << "-->";
   if(temp == NULL)
   cout<<"NULL"<<endl;
 
       //delete first node
   head = deleteFirstNode(head);
   cout<<"Linked list after deleting head node"<<endl; for (temp = head; temp != NULL; temp = temp->next)
   cout << temp->data << "-->";
   if(temp == NULL)
   cout<<"NULL"<<endl;
 
      //delete last node
   head = removeLastNode(head);
   cout<<"Linked list after deleting last node"<<endl; for (temp = head; temp != NULL; temp = temp->next)
   cout << temp->data << "-->";
   if(temp == NULL)
   cout<<"NULL";
 
   return 0;
}

#include<iostream>
#include<list> // for list operations
using namespace std;
  
int main()
{
    // initializing list of integers
    list<int> list1={10,15,20,25,30,35};
      
    // declaring list iterators
    list<int>::iterator it = list1.begin();
    list<int>::iterator it1 = list1.begin();
      
    // incrementing the positions of iterators
    advance(it,2);
    advance(it1,5);
      
    // printing original list
    cout << "The original list is : ";
    for (list<int>::iterator i=list1.begin(); i!=list1.end(); i++)
       cout << *i << " ";
       
    cout << endl;
      
    // using erase() to erase single element
    // erases 20
    list1.erase(it);
      
    // list after deletion 1 element
    cout << "The list after deleting 1 element using erase() : ";
    for (list<int>::iterator i=list1.begin(); i!=list1.end(); i++)
       cout << *i << " ";
       
    cout << endl;
      
    it = list1.begin();
      
    // incrementing the positions of iterators
    advance(it,2);
      
    // using erase() to erase multiple elements
    // erases 25,30
    list1.erase(it,it1);
      
    // list after deletion of multiple elements
    cout << "The list after deleting multiple elements using erase() : ";
    for (list<int>::iterator i=list1.begin(); i!=list1.end(); i++)
       cout << *i << " ";
       
    cout << endl;
  
      
}