header.py

from collections import *
from typing import *
from heapq import *
from functools import *
from itertools import *
from math import *
from sortedcontainers import *
from bisect import *
from operator import *
from string import *
from random import *
from copy import *


class TreeNode:
    def __init__(self, val=0, left=None, right=None):
        self.val = val
        self.left = left
        self.right = right


class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next


class Node:
    def __init__(self, val=0, left=None, right=None, random=None):
        self.val = val
        self.left = left
        self.right = right
        self.random = random


class NodeCopy:
    def __init__(self, val=0, left=None, right=None, random=None):
        self.val = val
        self.left = left
        self.right = right
        self.random = random


class BinaryMatrix:
    def get(self, row: int, col: int) -> int:
        pass

    def dimensions(self):
        pass


class NestedInteger:
    def __init__(self, value=None):
        """
        If value is not specified, initializes an empty list.
        Otherwise initializes a single integer equal to value.
        """

    def isInteger(self):
        """
        @return True if this NestedInteger holds a single integer, rather than a nested list.
        :rtype bool
        """

    def getInteger(self):
        """
        @return the single integer that this NestedInteger holds, if it holds a single integer
        Return None if this NestedInteger holds a nested list
        :rtype int
        """