1. Description

Create a shipping cost calculator. Input package weight (kg) and destination zone (1-5), calculate fee based on:

• Zone1: 10元 base (≤3kg) + 2元/kg extra
• Zone2: 15元 base (≤3kg) + 3元/kg extra
• Zone3: 20元 base (≤5kg) + 4元/kg extra
• Zone4: 25元 base (≤5kg) + 5元/kg extra
• Zone5: 30元 base (≤10kg) + 6元/kg extra Output "Invalid input" for invalid zone or weight≤0

2. Input & Output

Input:

• Two values separated by space (weight zone)

data = input().split()
weight = float(data[0])
zone = int(data[1])

Output:

• Shipping cost (1 decimal) or error message

Example

# Input: 
2.5 1
# Output: 
10.0

# Input: 
7 5
# Output: 
30.0