#include<bits/stdc++.h>

using namespace std;

struct node{
    int data;
    node* next;
};

struct node *head;

void insert(int x){
    node* temp=new node();
    temp->data=x;
    temp->next=head;
    head=temp;
}
 void print(){
     node* temp1=head;
     while(temp1!=NULL){
         cout<<temp1->data<<" ";
         temp1=temp1->next;
     }
     cout<<endl;
 }
int main()
{
    head=NULL;
    int n;
    cin>>n;
    for(int i=0;i<n;i++){
        int x;
        cin>>x;
        insert(x);
        print();
    }
    
    
    return 0;
}