#include<stdio.h>
#include
#include<math.h>
using namespace std;
int main()
{
int n;
cin>>n;
n/=2;
for(int i=1;i<=n+1;i++)
{ for(int j=1;j<=n2+1;j++) { if(n-i+2<j&&n+i>j) { cout<<" "; } else { cout<<""; } } cout<<endl; } for(int i=n;i>=1;i--) { for(int j=1;j<=n2+1;j++) { if(n-i+2<j&&n+i>j) { cout<<" "; } else { cout<<""; } } cout<<endl; } }