// editor2
#include<stdio.h>
typedef struct node{
    int data;
    struct node *next;
}Node;
Node *head,*tail;
void create(int num){
    Node *newnode = (Node*) malloc (1*sizeof(Node));
    newnode->data = num;
    newnode->next = NULL;
    if(head==NULL){
        head = newnode;
        tail = newnode;
    }
    tail->next = newnode;
    tail = newnode;
    
}

void display(){
    Node *itr;
    for(itr=head;itr!=NULL;itr = itr->next)
    {
        printf("%d ",itr->data);
        
    }
}

int main(){
    int num,size,ind;
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    
    for(ind=0;ind<size;ind++){
        scanf("%d",&num);
        if(num<0){
            printf("Invalid input");
            create(num);
        }
    display();
    return 0;
    }
   
}