Odpowiedź:
#include <iostream>
using namespace std;
int main(){
cout << "***" << endl;
cout << "****" << endl;
cout << "*****" << endl;
cout << "******" << endl;
cout << endl;
cout << " ****" << endl;
cout << " ******" << endl;
cout << " ********" << endl;
cout << "**********" << endl;
return 0;
}