// editor1
#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    if(n <= 0 || n % 2 == 0)
    {
        printf("Invalid input\n");
    }
    else
    {
        for (int i = n; i >= 1; i -=2)
        {
            int spaces = (n - i)/ 2;
            for (int j = 0; j < spacs; j++)
            {
                printf(" ");
            }
            for (int j = 0; j < 1; j++)
            {
                printf("*");
            }
            printf("\n");
        }
    }
    return 0;
}