#include <stdio.h>
#include <math.h>
int main()
{
double y;
int x, m, r;
scanf("%d", &r);
for (y=r; y>=-r; y--)
{
m = 2.5 * sqrt (r * r - y * y);
for (x=1; x<30-m; x++)
{
printf(" ");
}
printf("*");
for ( ; x<30+m; x++)
{
printf(" ");
}
printf("*\n");
}
return 0;
}