#include<iostream>
using namespace std;

void main() {
    int i, k, j, t, n;
    cout << "Please insert  a number: " << endl;
    cin >> n;
    for (i = 1; i <= n; i++)
    {
        for (k = 1; k <= i; k++)
            cout << "*";
        for (j = 1; j <= 2 * (n - i); j++)
            cout << " ";
        for (t = 1; t <= i; t++)
            cout << "*";
        cout << endl;
    }
}