205-Isomorphic-Strings

Sat 17 May 2025

https://leetcode.com/problems/isomorphic-strings

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def isIsomorphic(self, s: str, t: str) -> bool:
    return [*map(s.index, s)] == [*map(t.index, t)]
new Solution().isIsomorphic()

Score: 5

Category: leetcode

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206-Reverse-Linked-List

Sat 17 May 2025

https://leetcode.com/problems/reverse-linked-list

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def reverseList(self, head: Optional[ListNode]) -> Optional[ListNode]:
    if not head or not head.next:
      return head

    newHead = self.reverseList(head.next)
    head.next.next = head
    head.next = None …

Category: leetcode

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207-Course-Schedule

Sat 17 May 2025

https://leetcode.com/problems/course-schedule

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
from enum import Enum


class State(Enum):
  kInit = 0
  kVisiting = 1
  kVisited = 2


class Solution:
  def canFinish(self, numCourses: int, prerequisites: List[List[int]]) -> bool:
    graph = [[] for _ in range(numCourses …

Category: leetcode

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209-Minimum-Size-Subarray-Sum

Sat 17 May 2025

https://leetcode.com/problems/minimum-size-subarray-sum

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def minSubArrayLen(self, s: int, nums: List[int]) -> int:
    ans = math.inf
    summ = 0
    j = 0

    for i, num in enumerate(nums):
      summ += num
      while summ >= s:
        ans = min …

Category: leetcode

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21-Merge-Two-Sorted-Lists

Sat 17 May 2025

https://leetcode.com/problems/merge-two-sorted-lists

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def mergeTwoLists(self, list1: Optional[ListNode], list2: Optional[ListNode]) -> Optional[ListNode]:
    if not list1 or not list2:
      return list1 if list1 else list2
    if list1.val > list2.val:
      list1 …

Category: leetcode

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210-Course-Schedule-Ii

Sat 17 May 2025

https://leetcode.com/problems/course-schedule-ii

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
from enum import Enum


class State(Enum):
  kInit = 0
  kVisiting = 1
  kVisited = 2


class Solution:
  def findOrder(self, numCourses: int, prerequisites: List[List[int]]) -> List[int]:
    ans = []
    graph = [[] for _ in …

Category: leetcode

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212-Word-Search-Ii

Sat 17 May 2025

https://leetcode.com/problems/word-search-ii

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class TrieNode:
  def __init__(self):
    self.children: Dict[str, TrieNode] = defaultdict(TrieNode)
    self.word: Optional[str] = None


class Solution:
  def findWords(self, board: List[List[str]], words: List[str]) -> List[str …

Category: leetcode

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213-House-Robber-Ii

Sat 17 May 2025

https://leetcode.com/problems/house-robber-ii

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def rob(self, nums: List[int]) -> int:
    if not nums:
      return 0
    if len(nums) < 2:
      return nums[0]

    def rob(l: int, r: int) -> int:
      dp1 = 0
      dp2 …

Category: leetcode

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214-Shortest-Palindrome

Sat 17 May 2025

https://leetcode.com/problems/shortest-palindrome

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def shortestPalindrome(self, s: str) -> str:
    t = s[::-1]

    for i in range(len(t)):
      if s.startswith(t[i:]):
        return t[:i] + s

    return t + s
new Solution …

Category: leetcode

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215-Kth-Largest-Element-In-An-Array

Sat 17 May 2025

https://leetcode.com/problems/kth-largest-element-in-an-array

import pyutil as pyu
pyu.get_local_pyinfo()
print(pyu.ps2("python-dotenv"))
from typing import List
class Solution:
  def findKthLargest(self, nums: List[int], k: int) -> int:
    minHeap = []

    for num in nums:
      heapq.heappush(minHeap, num)
      if len(minHeap) > k:
        heapq.heappop(minHeap)

    return minHeap[0]
new …

Category: leetcode

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