# 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 = 0;j < n - i;j++){ cout << " "; } for(int j = 0;j < i * 2 - 1;j++){ cout << "*"; } cout << endl; } return 0; }