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‎README.md

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# **[LeetCode Records](https://leetcode.com/u/Zanger/)** (615 solved)
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# **[LeetCode Records](https://leetcode.com/u/Zanger/)** (616 solved)
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<!-- This readme was generated using [WikiLeet](<https://github.com/Zanger67/WikiLeet>) -->
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| 251 | [Flatten 2D Vector](<https://leetcode.com/problems/flatten-2d-vector>) | Medium | | [solution](<markdowns/_251. Flatten 2D Vector.md>) | py |
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| 260 | [Single Number III](<https://leetcode.com/problems/single-number-iii>) | Medium | | [solution](<markdowns/_260. Single Number III.md>) | py |
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| 261 | [Graph Valid Tree](<https://leetcode.com/problems/graph-valid-tree>) | Medium | B75, N150, Weekly Premium | [solution](<markdowns/_261. Graph Valid Tree.md>) | py |
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<markdowns/_266. Palindrome Permutation.md>) | py |
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| 271 | [Encode and Decode Strings](<https://leetcode.com/problems/encode-and-decode-strings>) | Medium | B75, N150 | [solution](<markdowns/_271. Encode and Decode Strings.md>) | py |
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| 272 | [Closest Binary Search Tree Value II](<https://leetcode.com/problems/closest-binary-search-tree-value-ii>) | Hard | | [solution](<markdowns/_272. Closest Binary Search Tree Value II.md>) | py |
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| 273 | [Integer to English Words](<https://leetcode.com/problems/integer-to-english-words>) | Hard | Daily | [solution](<markdowns/_273. Integer to English Words.md>) | py |

‎markdowns/Easy.md

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# Easy Questions (178)
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# Easy Questions (179)
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*[Back to top](<../README.md>)*
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| 226 | [Invert Binary Tree](<https://leetcode.com/problems/invert-binary-tree>) | Easy | B75, N150 | [solution](<_226. Invert Binary Tree.md>) | py | Jul 03, 2024 |
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| 231 | [Power of Two](<https://leetcode.com/problems/power-of-two>) | Easy | | [solution](<_231. Power of Two.md>) | py | Mar 04, 2025 |
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| 242 | [Valid Anagram](<https://leetcode.com/problems/valid-anagram>) | Easy | B75, N150 | [solution](<_242. Valid Anagram.md>) | c, py | Jun 13, 2024 |
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 292 | [Nim Game](<https://leetcode.com/problems/nim-game>) | Easy | | [solution](<_292. Nim Game.md>) | py | May 23, 2024 |
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| 326 | [Power of Three](<https://leetcode.com/problems/power-of-three>) | Easy | | [solution](<_326. Power of Three.md>) | py | Mar 04, 2025 |
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| 342 | [Power of Four](<https://leetcode.com/problems/power-of-four>) | Easy | | [solution](<_342. Power of Four.md>) | py | Mar 04, 2025 |

‎markdowns/Questions_By_Code_Length.md

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| 796 | [Rotate String](<https://leetcode.com/problems/rotate-string>) | Easy | | [solution](<_796. Rotate String.md>) | py | Nov 04, 2024 |
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| 2894 | [Divisible and Non-divisible Sums Difference](<https://leetcode.com/problems/divisible-and-non-divisible-sums-difference>) | Easy | | [solution](<_2894. Divisible and Non-divisible Sums Difference.md>) | py | May 22, 2024 |
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| 619 | [Biggest Single Number](<https://leetcode.com/problems/biggest-single-number>) | Easy | | [solution](<_619. Biggest Single Number.md>) | sql | May 22, 2024 |
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 183 | [Customers Who Never Order](<https://leetcode.com/problems/customers-who-never-order>) | Easy | | [solution](<_183. Customers Who Never Order.md>) | sql | May 22, 2024 |
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| 3210 | Weekly Contest 405 - q1 - [Find the Encrypted String](<https://leetcode.com/problems/find-the-encrypted-string>) | Easy | Contest | [solution](<_3210. Find the Encrypted String.md>) | py | Jul 07, 2024 |
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| 181 | [Employees Earning More Than Their Managers](<https://leetcode.com/problems/employees-earning-more-than-their-managers>) | Easy | | [solution](<_181. Employees Earning More Than Their Managers.md>) | sql | May 22, 2024 |

‎markdowns/Questions_By_Recent.md

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| # | Title | Level | Cats | Solution | Languages | Date Complete |
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|-----:|:-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|:--------|:--------------------------|:----------------------------------------------------------------------------------------------------|:--------------------------------------------|:----------------|
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 2529 | [Maximum Count of Positive Integer and Negative Integer](<https://leetcode.com/problems/maximum-count-of-positive-integer-and-negative-integer>) | Easy | Daily | [solution](<_2529. Maximum Count of Positive Integer and Negative Integer.md>) | py | Mar 12, 2025 |
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| 42 | [Trapping Rain Water](<https://leetcode.com/problems/trapping-rain-water>) | Hard | N150 | [solution](<_42. Trapping Rain Water.md>) | py | Mar 11, 2025 |
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| 2063 | [Vowels of All Substrings](<https://leetcode.com/problems/vowels-of-all-substrings>) | Medium | | [solution](<_2063. Vowels of All Substrings.md>) | py | Mar 11, 2025 |

‎markdowns/Topics.md

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------
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- [Array](<by_topic/Array.md>) (302 completed)
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- [String](<by_topic/String.md>) (144 completed)
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- [Hash Table](<by_topic/Hash Table.md>) (137 completed)
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- [String](<by_topic/String.md>) (145 completed)
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- [Hash Table](<by_topic/Hash Table.md>) (138 completed)
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- [Depth-First Search](<by_topic/Depth-First Search.md>) (103 completed)
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- [Tree](<by_topic/Tree.md>) (91 completed)
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- [Binary Tree](<by_topic/Binary Tree.md>) (82 completed)
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- [Linked List](<by_topic/Linked List.md>) (45 completed)
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- [Simulation](<by_topic/Simulation.md>) (42 completed)
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- [Design](<by_topic/Design.md>) (37 completed)
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- [Bit Manipulation](<by_topic/Bit Manipulation.md>) (35 completed)
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- [Bit Manipulation](<by_topic/Bit Manipulation.md>) (36 completed)
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- [Counting](<by_topic/Counting.md>) (33 completed)
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- [Binary Search](<by_topic/Binary Search.md>) (31 completed)
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- [Backtracking](<by_topic/Backtracking.md>) (27 completed)

‎markdowns/Weekly_Questions.md

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| # | Title | Level | Cats | Solution | Languages | Date Complete |
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|-----:|:---------------------------------------------------------------------------------------------------------------------------------------------|:--------|:--------------------------|:-----------------------------------------------------------------------------|:------------|:----------------|
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 1100 | [Find K-Length Substrings With No Repeated Characters](<https://leetcode.com/problems/find-k-length-substrings-with-no-repeated-characters>) | Medium | Weekly Premium | [solution](<_1100. Find K-Length Substrings With No Repeated Characters.md>) | py | Mar 08, 2025 |
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| 1151 | [Minimum Swaps to Group All 1's Together](<https://leetcode.com/problems/minimum-swaps-to-group-all-1s-together>) | Medium | Weekly Premium | [solution](<_1151. Minimum Swaps to Group All 1's Together.md>) | py | Mar 01, 2025 |
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| 487 | [Max Consecutive Ones II](<https://leetcode.com/problems/max-consecutive-ones-ii>) | Medium | Weekly Premium | [solution](<_487. Max Consecutive Ones II.md>) | py | Feb 22, 2025 |

‎markdowns/_266. Palindrome Permutation.md

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# 266. [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>)
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*All prompts are owned by LeetCode. To view the prompt, click the title link above.*
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*[Back to top](<../README.md>)*
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------
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> *First completed : March 15, 2025*
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>
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> *Last updated : March 15, 2025*
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------
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> **Related Topics** : **[Hash Table](<by_topic/Hash Table.md>), [String](<by_topic/String.md>), [Bit Manipulation](<by_topic/Bit Manipulation.md>)**
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>
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> **Acceptance Rate** : **68.08 %**
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------
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## Solutions
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- [e266.py](<../my-submissions/e266.py>)
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### Python
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#### [e266.py](<../my-submissions/e266.py>)
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```Python
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class Solution:
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def canPermutePalindrome(self, s: str) -> bool:
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return sum(x % 2 for x in Counter(s).values()) <= 1
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```
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‎markdowns/by_topic/Bit Manipulation.md

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# [Bit Manipulation](<https://leetcode.com/tag/Bit-Manipulation/>) (35 completed)
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# [Bit Manipulation](<https://leetcode.com/tag/Bit-Manipulation/>) (36 completed)
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*[Back to top](<../../README.md>)*
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| 191 | [Number of 1 Bits](<https://leetcode.com/problems/number-of-1-bits>) | Easy | B75, N150 | [solution](<../_191. Number of 1 Bits.md>) | py | Jul 03, 2024 |
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| 231 | [Power of Two](<https://leetcode.com/problems/power-of-two>) | Easy | | [solution](<../_231. Power of Two.md>) | py | Mar 04, 2025 |
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| 260 | [Single Number III](<https://leetcode.com/problems/single-number-iii>) | Medium | | [solution](<../_260. Single Number III.md>) | py | Jun 08, 2024 |
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<../_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 287 | [Find the Duplicate Number](<https://leetcode.com/problems/find-the-duplicate-number>) | Medium | N150 | [solution](<../_287. Find the Duplicate Number.md>) | c | Jun 26, 2024 |
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| 320 | [Generalized Abbreviation](<https://leetcode.com/problems/generalized-abbreviation>) | Medium | Weekly Premium | [solution](<../_320. Generalized Abbreviation.md>) | py | Aug 22, 2024 |
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| 342 | [Power of Four](<https://leetcode.com/problems/power-of-four>) | Easy | | [solution](<../_342. Power of Four.md>) | py | Mar 04, 2025 |

‎markdowns/by_topic/Hash Table.md

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# [Hash Table](<https://leetcode.com/tag/Hash-Table/>) (137 completed)
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# [Hash Table](<https://leetcode.com/tag/Hash-Table/>) (138 completed)
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*[Back to top](<../../README.md>)*
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| 208 | [Implement Trie (Prefix Tree)](<https://leetcode.com/problems/implement-trie-prefix-tree>) | Medium | B75, N150 | [solution](<../_208. Implement Trie (Prefix Tree).md>) | py | Jun 27, 2024 |
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| 217 | [Contains Duplicate](<https://leetcode.com/problems/contains-duplicate>) | Easy | B75, N150 | [solution](<../_217. Contains Duplicate.md>) | py | Jun 12, 2024 |
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| 242 | [Valid Anagram](<https://leetcode.com/problems/valid-anagram>) | Easy | B75, N150 | [solution](<../_242. Valid Anagram.md>) | c, py | Jun 13, 2024 |
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| 266 | [Palindrome Permutation](<https://leetcode.com/problems/palindrome-permutation>) | Easy | Weekly Premium | [solution](<../_266. Palindrome Permutation.md>) | py | Mar 15, 2025 |
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| 314 | [Binary Tree Vertical Order Traversal](<https://leetcode.com/problems/binary-tree-vertical-order-traversal>) | Medium | | [solution](<../_314. Binary Tree Vertical Order Traversal.md>) | py | Jun 12, 2024 |
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| 347 | [Top K Frequent Elements](<https://leetcode.com/problems/top-k-frequent-elements>) | Medium | B75, N150 | [solution](<../_347. Top K Frequent Elements.md>) | py | Jun 13, 2024 |
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| 348 | [Design Tic-Tac-Toe](<https://leetcode.com/problems/design-tic-tac-toe>) | Medium | | [solution](<../_348. Design Tic-Tac-Toe.md>) | py | Jul 05, 2024 |

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