/* A program that prints an isosceles triangle of asterisks ('*') */

#include <stdio.h>

int main()
{
  int i, j;
  int num;
  if (scanf("%d", &num) != 1) {
    printf("ERROR: failed to read a number!\n");
    return -1;
  }
  for (i = 0; i < num; i++) {
    for (j = 0; j < num - i - 1; j++)
      printf(" ");
    for (j = 0; j < 2 * i + 1; j++)
      printf("*");
    printf("\n");
  }

  return 0;
}