while True: try: n = int(input()) for i in range(1, n+1): # 打印空格 print(' '*(n-i), end='') # 打印递增数字 for j in range(1, i+1): print(j, end='') # 打印递减数字 for j in range(i-1, 0, -1): print(j, end='') print() # 换行 except: break