#include <bits/stdc++.h> using namespace std; int main(){ int n; cin>>n; for(int i = (n+1)/2-1;i>=0;i--){ for(int j=1;j<=(n+1)/2-i-1;j++){ cout<<" "; } for(int j=1;j<=2i+1;j++){ cout<<""; } cout<<endl; } for(int i = 1;i<=n/2;i++){ for(int j=1;j<=n/2-i;j++){ cout<<" "; } for(int j=1;j<=2i+1;j++){ cout<<""; } cout<<endl; }

return 0;

}