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