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