题解

#include<bits/stdc++.h>
using namespace std;
int main()
{
    cout<<"      *"<<endl;
    cout<<"    *   *"<<endl;
    cout<<"  *       * "<<endl;
    cout<<"*           *"<<endl;
    cout<<"  *       *"<<endl;
    cout<<"    *   *"<<endl;
    cout<<"      *"<<endl;
    return 0;
}