mdpabel

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mdpabel

class Solution:
    def twoSum(self, nums: List[int], target: int) -> List[int]:
        seen = {}

        for idx,num in enumerate(nums):
            req = target - num
            if req in seen:
                return [seen[req], idx]
            seen[num] = idx

mdpabel

v = 0  # global variable


def a():
    def test(n):
        nonlocal m  # used in nested function whose local scope is not defined
        global v  # outside of function or in global scope
        if n == 5:
            return n
        t = test(n + 1)  # local variable

mdpabel

def isUnival(root, val):
    if root is None:
        return True
    if root.val != val:
        return False

    left = isUnival(root.left, val)
    right = isUnival(root.right, val)

    if not left or not right:

mdpabel

s = "      hello          bangladesh"

li = []
startIdx = 0

for i in range(len(s)):
    if s[i] == " " and s[startIdx] != " ":
        li.append(s[startIdx : i])
        startIdx = i
    elif s[startIdx] == " ":

mdpabel

const arr = [
  1,
  [2],
  [[3]],
  [[[4]]],
  [5],
  [[[[[[[[[[[[7]]]]]]]], 1]]]],
  7,
  [[[10], [[[[[[[[1]]]]]]]]]],
];

mdpabel

class Solution:
    def solveNQueens(self, n: int) -> List[List[str]]:
        res = []
        def canPlace(board, n, row, col):
            # col
            for i in range(row):
                if board[i][col]:
                    return False

            # left diagonal

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from collections import Counter
from heapq import heappush, heappop, heappushpop

class Item(object):
    def __init__(self, word, freq):
        self.word = word
        self.freq = freq
        
    def __lt__(self, other):
        if self.freq == other.freq:

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const arr = [1,5,2,9,7,6]
/**
1 5 9 7 2 6

l = 1
r = 4
1,5,2,9,7,6
2 odd ? l++
2 even ? r--
else : l

mdpabel

"""
"41234"
one thousand, two hundred and thirty four 

last 2 digits
44 = fourty + four
34 = thirty + four
24 = twinty + four