Queue

C++

Java

Python3

include

#include <queue>

import java.util.*;

new

std::queue<int> q;

Queue<Integer> q = new LinkedList<>();

q = []

push

q.push(i);

q.add(i);

q.append(i)

pop

q.pop()

popped = q.remove();

popped = q.pop(0)

front

q.front()

q.peek()

q[0]

size

q.size()

q.size()

len(q)

check empty

if (q.empty())

if (q.isEmpty())

if not q: