#include <iostream>
using namespace std; 
int main() {
    int space, rows; 
    cout << "Enter the no of rows :"<<endl; 
    cin>>rows; 
    for (int i=1,k=0;i<=rows; ++i, k=0)
    {
        for (space=1;space<=rows-i;++space )
        {
            cout<<"   ";
        }
        while (k!= 2*i-1)
        {
            cout  << "* ";
            ++k; 
        }
        cout <<endl; 
    }
    return 0;
}