n = int(input()) a = [[0]*n for x in range(n)] for i in range(n): for j in range(n): if i == j: # 主对角线的元素 a[i][j] = i + 1 for jj in range(j, n): a[i][jj] = i + 1 a[jj][i] = i + 1 for row in a: print(*row)