///Constructii in memorie
///n=5; 1 2 3 4 5/2 3 4 5 4/3 4 5 4 3/4 5 4 3 2/5 4 3 2 1
#include <iostream>
using namespace std;
int main()
{
    int a[100][100],n,i,j,aux;
    cout<<"n=";
    cin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n+1-i;j++)
            if(i+j<n+1)
            {
                a[i][j]=i+j-1;
                a[n-i+1][n-j+1]=i+j-1;
            }
            else
                if(i+j==n+1)
                    a[i][j]=n;
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
            cout<<a[i][j]<<' ';
        cout<<endl;
    }
    cout<<endl<<endl;
    return 0;
}