#include <bits/stdc++.h> using namespace std; int main() { int c,d,i,j,k,n; while (cin>>n) { i=1; k=2*(n-1); c=1; while (i<=n*2-1) { j=0; while (j<k) { cout<<" "; j++; } d=j=1; while (d<=c) { cout<<j; if (d>c/2) j--; else j++; d++; } printf("\n"); i++; if (i>n) { k=k+1; c=c-2; } else { k=k-1; c=c+2; } } } return 0; }