Python 程序：根据包裹重量计算邮寄费用或判断能否邮寄

```python x = int(input()) if x > 30: print("Fail") else: if x <= 10: fee = 0.2 + x * 0.8 elif 10 < x <= 20: fee = 0.2 + x * 0.75 else: fee = 0.2 + x * 0.7 print(f"{fee:.2f}") ``` ######[AI问答 | 110点数解答 | 2026-01-29 17:00:41]