n = int(input()) a = [] for i in range(n): b = [] for j in range(n): b.append(0) a.append(b) for i in range(n): for j in range(i, n): a[i][j] = i + 1 for j in range(n): for i in range(j + 1, n): a[i][j] = j + 1 for i in range(n): for j in range(n): print(a[i][j], end = " ") print()