350-Intersection-Of-Two-Arrays-Ii

Fri 14 November 2025

https://leetcode.com/problems/intersection-of-two-arrays-ii

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def intersect(self, nums1: List[int], nums2: List[int]) -> List[int]:
    if len(nums1) > len(nums2):
      return self.intersect(nums2, nums1)

    ans = []
    count = Counter(nums1)

    for num in nums2 …

Category: leetcode

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351-Android-Unlock-Patterns

Fri 14 November 2025

https://leetcode.com/problems/android-unlock-patterns

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def numberOfPatterns(self, m: int, n: int) -> int:
    seen = set()
    accross = [[0] * 10 for _ in range(10)]

    accross[1][3] = accross[3][1] = 2
    accross[1][7] = accross …

Category: leetcode

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354-Russian-Doll-Envelopes

Fri 14 November 2025

https://leetcode.com/problems/russian-doll-envelopes

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def maxEnvelopes(self, envelopes: List[List[int]]) -> int:
    envelopes.sort(key=lambda x: (x[0], -x[1]))
    # Same as 300. Longest Increasing Subsequence
    ans = 0
    dp = [0] * len(envelopes …

Category: leetcode

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356-Line-Reflection

Fri 14 November 2025

https://leetcode.com/problems/line-reflection

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def isReflected(self, points: List[List[int]]) -> bool:
    minX = math.inf
    maxX = -math.inf
    seen = set()

    for x, y in points:
      minX = min(minX, x)
      maxX = max(maxX, x …

Category: leetcode

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357-Count-Numbers-With-Unique-Digits

Fri 14 November 2025

https://leetcode.com/problems/count-numbers-with-unique-digits

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def countNumbersWithUniqueDigits(self, n: int) -> int:
    if n == 0:
      return 1

    ans = 10
    uniqueDigits = 9
    availableNum = 9

    while n > 1 and availableNum > 0:
      uniqueDigits *= availableNum
      ans += uniqueDigits
      n -= 1 …

Category: leetcode

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358-Rearrange-String-K-Distance-Apart

Fri 14 November 2025

https://leetcode.com/problems/rearrange-string-k-distance-apart

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def rearrangeString(self, s: str, k: int) -> str:
    n = len(s)
    ans = []
    count = Counter(s)
    valid = Counter()  # valid[i] := the leftmost index i can appear

    # Returns the letter that …

Category: leetcode

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36-Ease-Of-Movement

Fri 14 November 2025
# Created: 20250104
import pyutil as pyu
pyu.get_local_pyinfo()
'conda env: ml312-2024; pyv: 3.12.7 | packaged by Anaconda, Inc. | (main, Oct  4 2024, 13:27:36) [GCC 11.2.0]'
print(pyu.ps2("yfinance pandas matplotlib"))
yfinance==0.2.51
pandas==2.2.3
matplotlib==3.9.3
import …

Category: stockmarket

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36-Valid-Sudoku

Fri 14 November 2025

https://leetcode.com/problems/valid-sudoku

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def isValidSudoku(self, board: List[List[str]]) -> bool:
    seen = set()

    for i in range(9):
      for j in range(9):
        c = board[i][j]
        if c == '.':
          continue
        if c …

Category: leetcode

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360-Sort-Transformed-Array

Fri 14 November 2025

https://leetcode.com/problems/sort-transformed-array

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def sortTransformedArray(self, nums: List[int], a: int, b: int, c: int) -> List[int]:
    n = len(nums)
    upward = a > 0
    ans = [0] * n

    # The concavity of f only depends …

Category: leetcode

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361-Bomb-Enemy

Fri 14 November 2025

https://leetcode.com/problems/bomb-enemy

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def maxKilledEnemies(self, grid: List[List[chr]]) -> int:
    m = len(grid)
    n = len(grid[0])
    enemyCount = 0
    # dp[i][j] := max enemies grid[i][j] can kill
    dp = [[0 …

Category: leetcode

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Page 34 of 146

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