# include<iostream> # include<cstdio> using namespace std; int main() { int n; cin >> n; for(int i = 1;i <= n;i++){ for(int j = 0;j < n - i;j++){ cout << " "; } for(int j = 0;j < i * 2 - 1;j++){ cout << "*"; } cout << endl; } for(int i = n - 1;i >= 1;i--){ for(int j = n - i;j >= 1;j--){ cout<<" "; } for(int j=i * 2 - 1;j > 0;j--){ cout<<"*"; } cout << endl; } return 0; }