#include <stdio.h>

   int main ()
   {
     int n;
     if (scanf ("%d", &n) != 1)
         {
           printf("Invalid Input");
           return 0;
         }
    
     if (n <= 0 || n % 2 == 0) 
         {  
           printf("Invalid Input");
           return 0;
         }
       
     int space = 0;
    for (int i = n; i >= 1; i -= 2)
    {
        for (int s = 0; i > space; s++)
         {
            printf(" ");
         }
         
         for (int j = 0; j < i; j++)
         {
           printf("*");
         }
           printf("\n");
          space++;
   }
         
    return 0;   
   }