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