class Queue:

    def __init__(self):
        self.queue = []

    def push(self, value):
        self.queue.append(value)

    def pop(self):
        self.queue.pop(0)

    def queue_size(self):
        return len(self.queue)

6c9d03066e8c3c63b75440be6fa55aa646871b9d
class Queue:

    def __init__(self):
        self.queue = []
    <mask token>
    <mask token>
    <mask token>

class Queue:

    def __init__(self):
        self.queue = []
    <mask token>

    def pop(self):
        self.queue.pop(0)
    <mask token>

class Queue:

    def __init__(self):
        self.queue = []

    def push(self, value):
        self.queue.append(value)

    def pop(self):
        self.queue.pop(0)
    <mask token>

class Queue:

    def __init__(self):
        self.queue = []

    def push(self, value):
        self.queue.append(value)

    def pop(self):
        self.queue.pop(0)

    def queue_size(self):
        return len(self.queue)
