Class vs Instance Attributes

Lab Python Intermediate 20 points

Create Student with a class attribute count = 0 that increases every time a student is created. Read names, create a student for each, then print the count and the names.

Input

One line of names.

Output

Two lines: the count, then the names.

Example

Input

ann bob cy

Output

3
ann bob cy

Sample input available Sample output available

Editor

Python

Hints

A class attribute is shared by all instances.

Update it through the class: Student.count += 1.

Solution explanation

Writing self.count += 1 would create a separate instance attribute instead.

Show solution

class Student:
    count = 0

    def __init__(self, name):
        self.name = name
        Student.count += 1


students = [Student(n) for n in input().split()]
print(Student.count)
print(*[s.name for s in students])

Output

Answer