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