#include<iostream>
using namespace std;
int rows,row;
int main(){
cout<<"enter number of rows "<<endl;
cin>>rows;
row=(rows/2)+1;
for(int x=1;x<=row;x++){
for(int y=1;y<=row-x;y++){
cout<<" ";
}
for(int y=1;y<=(2*x)-1;y++){
cout<<"*";
}
cout<<endl;
}
for(int x=1;x<=(rows/2);x++){
for(int y=1;y<=x;y++){
cout<<" ";
}
for(int y=2*((rows/2)+1-x)-1;y>=1;y--){
cout<<"*";
}
cout<<endl;
}
}
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