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