Scanner scn = new Scanner(System.in);
int n = scn.nextInt();
int row = 1;
int nst = 1;
int nsp = n - 1;
int val;
while (row <= n) {
val = 1;
for (int csp = 1; csp <= nsp; csp++) {
System.out.print("\t");
}
for (int cst = 1; cst <= nst; cst++) {
System.out.print(val + "\t");
if (cst <= nst / 2) {
val++;
} else
{
val--;
}
}
}