#include <stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    if (n % 2 == 0 || n <= 0)
    {
        printf ("Invalid input ");
        return 0;
    }
    for (int i = 0; i< n/2 + 1;i++)
    {
        for (int j = 0; j <i;j++)
        printf(" ";
        for (int k =0; k < n -2*i;k++)
        printf("*";
        printf("\n");)
        }
        return 0;
}