Challenge: Clean the Data

Lab Python Intermediate 20 points

A form collected people's ages, but some entries are rubbish. Read the entries, ignore anything that isn't a whole number, and also ignore numbers below 0 or above 120.

Input

A count n, then n lines of entries.

Output

Valid: <how many valid ages>
Invalid: <how many were skipped>
Average: <average of the valid ages, 1 decimal>

If no age is valid, print Average: none as the last line.

Example

Input

5
21
abc
35
-4
40

Output

Valid: 3
Invalid: 2
Average: 32.0

Sample input available Sample output available

Editor

Python

Hints

Use try/except ValueError around int().

continue skips to the next entry.

Check the range with 0 <= age <= 120.

Solution explanation

Each entry is tried as a number. Bad text is caught by except; numbers outside the range are counted as invalid with a normal if.

Show solution

ages = []
bad = 0
for _ in range(int(input())):
    entry = input()
    try:
        age = int(entry)
    except ValueError:
        bad += 1
        continue
    if 0 <= age <= 120:
        ages.append(age)
    else:
        bad += 1
print("Valid:", len(ages))
print("Invalid:", bad)
if ages:
    print(f"Average: {sum(ages) / len(ages):.1f}")
else:
    print("Average: none")

Output

Answer