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