Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int row = 1;
int nst = 1;
int nsp = n / 2;
while (row <= n) {
// spaces
for (int csp = 1; csp <= nsp; csp++) {
System.out.print(" ");
}
// stars
for (int cst = 1; cst <= nst; cst++) {
if (cst == 1 || cst == nst)
System.out.print("* ");
else
System.out.print(" ");
}
//update
System.out.println();
if (row <= n / 2) {
nsp--;
} else {
nsp++;
}
if (row <= n / 2) {
nst = nst + 2;
} else {
nst = nst - 2;
}
row++;
}