#include<iostream> 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; } }