#include <stdio.h>
void main() {
  int i,j,n;

  printf("give me the row number of star --> "); scanf("%d",&n);
  for (i=0; i<n; i++) {
    for (j=1; j<(n-i); j++) printf(" ");
    for (j=1; j<=n; j++) printf("*");
    printf("\n");
  }
  for (i=n-2; i>=0; i--) {
    for (j=1; j<(n-i); j++) printf(" ");
    for (j=1; j<=n; j++) printf("*");
    printf("\n");

  }
}