// editor1
#include<stdio.h>
#include<stdlib.h>
struct node{
    int data;
    struct node* next;
    struct node* prev;
};
struct node* head=NULL;
struct node* temp;
void createlist(){
   struct node* newnode=(struct node*)malloc(sizeof(struct node));
   scanf("%d ",&newnode->data);
   newnode->data=data;
   
}
void printlist(){
    temp=head;
    while(temp!=NULL){
        printf("%d",temp->data);
        temp=temp->next;
    }
}
void deleteatfirst(){
    
}
int main(){
    int n;
    scanf("%d",&n);
    
}