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