Butterfly Pattern

 /* @ToDo 

Butterfly Pattern

    *                                   *

    *   *                           *   *

    *   *   *                   *   *   *

    *   *   *   *           *   *   *   *

    *   *   *   *   *   *   *   *   *   *

    *   *   *   *           *   *   *   *

    *   *   *                   *   *   *

    *   *                           *   *

    *                                   *

*/

#include <iostream>

using namespace std;

int main(){

     #ifndef ONLINE_JUDGE

        freopen("../asset/input.txt","r",stdin);

        freopen("../asset/output.txt","w",stdout);

    #endif

    // Code here!!

    int n; cin>>n;

    for(int i=1;i<=n;i++){

        for(int j=1;j<=2*n;j++){

            if(j<=i || j >(2*n)-i)

                cout<<"\t*";

            else cout<<"\t";

        }

        cout<<endl;

    }

    for(int i=1;i<=n;i++){

        for(int j=n-i;j>0;j--)

            cout<<"\t*";

        for(int j=2*i;j>0;j--)    

            cout<<"\t";

        for(int j=n-i;j>0;j--)

            cout<<"\t*";

        

        cout<<endl;

    }

    return 0;

}