#include <stdio.h>
int main()
{
    int n;
    scanf ("%d" , &n);
    if(n % 2 == 0){
        printf ("invalid input");
        return 0;
        
    } 
    int spaces =0;
    for(int stars = n; stars > 0 ; stars =2) {
        for (int s = 0; s <  spaces;s++ ) {
            printf (" ");
        }
        for (int st = 0; st < stars; st++) {
            printf("*");
            }
            printf ("\n");
            spaces++;
    }
    return 0;
}