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Title: GitHub - polya20/LeetCode: Python Solutions of All 249 LeetCode Algorithms / 13 Database / 4 Shell Questions

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Bit Manipulationhttps://github.com/kamyu104/LeetCode#bit-manipulation
Arrayhttps://github.com/kamyu104/LeetCode#array
Stringhttps://github.com/kamyu104/LeetCode#string
Linked Listhttps://github.com/kamyu104/LeetCode#linked-list
Stackhttps://github.com/kamyu104/LeetCode#stack
Queuehttps://github.com/kamyu104/LeetCode#queue
Heaphttps://github.com/kamyu104/LeetCode#heap
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Hash Tablehttps://github.com/kamyu104/LeetCode#hash-table
Data Structurehttps://github.com/kamyu104/LeetCode#data-structure
Mathhttps://github.com/kamyu104/LeetCode#math
Two Pointershttps://github.com/kamyu104/LeetCode#two-pointers
Sorthttps://github.com/kamyu104/LeetCode#sort
Brute Force Searchhttps://github.com/kamyu104/LeetCode#brute-force-search
Divide and Conquerhttps://github.com/kamyu104/LeetCode#divide-and-conquer
Binary Searchhttps://github.com/kamyu104/LeetCode#binary-search
Binary Search Treehttps://github.com/kamyu104/LeetCode#binary-search-tree
Breadth-First Searchhttps://github.com/kamyu104/LeetCode#breadth-first-search
Depth-First Searchhttps://github.com/kamyu104/LeetCode#depth-first-search
Dynamic Programminghttps://github.com/kamyu104/LeetCode#dynamic-programming
Backtrackinghttps://github.com/kamyu104/LeetCode#backtracking
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https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note
Single Numberhttps://leetcode.com/problems/single-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/single-number.py
Single Number IIhttps://leetcode.com/problems/single-number-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/single-number-ii.py
Reverse Bitshttps://leetcode.com/problems/reverse-bits/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-bits.py
Number of 1 Bitshttps://leetcode.com/problems/number-of-1-bits/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/number-of-1-bits.py
Bitwise AND of Numbers Rangehttps://leetcode.com/problems/bitwise-and-of-numbers-range/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/bitwise-and-of-numbers-range.py
Power of Twohttps://leetcode.com/problems/power-of-two/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/power-of-two.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/power-of-two.py
Single Number IIIhttps://leetcode.com/problems/single-number-iii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/single-number-iii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/single-number-iii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-1
3 Sumhttps://leetcode.com/problems/3sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/3sum.py
3 Sum Closesthttps://leetcode.com/problems/3sum-closest/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/3sum-closest.py
Remove Duplicates from Sorted Arrayhttps://leetcode.com/problems/remove-duplicates-from-sorted-array/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-duplicates-from-sorted-array.py
Remove Elementhttps://leetcode.com/problems/remove-element/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-element.py
Next Permutationhttps://leetcode.com/problems/next-permutation/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/next-permutation.py
First Missing Positivehttps://leetcode.com/problems/first-missing-positive/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/first-missing-positive.py
Rotate Imagehttps://leetcode.com/problems/rotate-image/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/rotate-image.py
Spiral Matrixhttps://leetcode.com/problems/spiral-matrix/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/spiral-matrix.py
Spiral Matrix IIhttps://leetcode.com/problems/spiral-matrix-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/spiral-matrix-ii.py
Plus Onehttps://leetcode.com/problems/plus-one/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/plus-one.py
Set Matrix Zeroeshttps://leetcode.com/problems/set-matrix-zeroes/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/set-matrix-zeroes.py
Remove Duplicates from Sorted Array IIhttps://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-duplicates-from-sorted-array-ii.py
Pascal's Trianglehttps://leetcode.com/problems/pascals-triangle/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/pascals-triangle.py
Pascal's Triangle IIhttps://leetcode.com/problems/pascals-triangle-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/pascals-triangle-ii.py
Best Time to Buy and Sell Stockhttps://leetcode.com/problems/best-time-to-buy-and-sell-stock/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/best-time-to-buy-and-sell-stock.py
Longest Consecutive Sequencehttps://leetcode.com/problems/longest-consecutive-sequence/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-consecutive-sequence.py
Read N Characters Given Read4https://leetcode.com/problems/read-n-characters-given-read4/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/read-n-characters-given-read4.py
Read N Characters Given Read4 II - Call multiple timeshttps://leetcode.com/problems/read-n-characters-given-read4-ii-call-multiple-times/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/read-n-characters-given-read4-ii-call-multiple-times.py
Missing Rangeshttps://leetcode.com/problems/missing-ranges/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/missing-ranges.py
Majority Elementhttps://leetcode.com/problems/majority-element/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/majority-element.py
Rotate Arrayhttps://leetcode.com/problems/rotate-array/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/rotate-array.py
Minimum Size Subarray Sumhttps://leetcode.com/problems/minimum-size-subarray-sum/
Kth Largest Element in an Arrayhttps://leetcode.com/problems/kth-largest-element-in-an-array/
Summary Rangeshttps://leetcode.com/problems/summary-ranges/
Majority Element IIhttps://leetcode.com/problems/majority-element-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/majority-element-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/majority-element-ii.py
Product of Array Except Selfhttps://leetcode.com/problems/product-of-array-except-self/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/product-of-array-except-self.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/product-of-array-except-self.py
Search a 2D Matrix IIhttps://leetcode.com/problems/search-a-2d-matrix-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/search-a-2d-matrix-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-a-2d-matrix-ii.py
Shortest Word Distancehttps://leetcode.com/problems/shortest-word-distance/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/shortest-word-distance.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/shortest-word-distance.py
https://leetcode.com/problems/shortest-word-distancehttps://leetcode.com/problems/shortest-word-distance
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Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/shortest-word-distance-iii.py
Flatten 2D Vectorhttps://leetcode.com/problems/flatten-2d-vector/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/flatten-2d-vector.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/flatten-2d-vector.py
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Longest Palindromic Substringhttps://leetcode.com/problems/longest-palindromic-substring/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-palindromic-substring.py
ZigZag Conversionhttps://leetcode.com/problems/zigzag-conversion/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/zigzag-conversion.py
String to Integer (atoi)https://leetcode.com/problems/string-to-integer-atoi/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/string-to-integer-atoi.py
Longest Common Prefixhttps://leetcode.com/problems/longest-common-prefix/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-common-prefix.py
Implement strStr()https://leetcode.com/problems/implement-strstr/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/implement-strstr.py
Count and Sayhttps://leetcode.com/problems/count-and-say/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/count-and-say.py
Multiply Stringshttps://leetcode.com/problems/multiply-strings/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/multiply-strings.py
Length of Last Wordhttps://leetcode.com/problems/length-of-last-word/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/length-of-last-word.py
Add Binaryhttps://leetcode.com/problems/add-binary/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/add-binary.py
Text Justificationhttps://leetcode.com/problems/text-justification/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/text-justification.py
Valid Palindromehttps://leetcode.com/problems/valid-palindrome/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/valid-palindrome.py
Reverse Words in a Stringhttps://leetcode.com/problems/reverse-words-in-a-string/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-words-in-a-string.py
One Edit Distancehttps://leetcode.com/problems/one-edit-distance/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/one-edit-distance.py
Compare Version Numbershttps://leetcode.com/problems/compare-version-numbers/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/compare-version-numbers.py
Reverse Words in a String IIhttps://leetcode.com/problems/reverse-words-in-a-string-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-words-in-a-string-ii.py
Isomorphic Stringshttps://leetcode.com/problems/isomorphic-strings/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/isomorphic-strings.py
Shortest Palindromehttps://leetcode.com/problems/shortest-palindrome/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/shortest-palindrome.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/shortest-palindrome.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-3
Add Two Numbershttps://leetcode.com/problems/add-two-numbers/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/add-two-numbers.py
Swap Nodes in Pairshttps://leetcode.com/problems/swap-nodes-in-pairs/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/swap-nodes-in-pairs.py
Reverse Nodes in k-Grouphttps://leetcode.com/problems/reverse-nodes-in-k-group/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-nodes-in-k-group.py
Rotate Listhttps://leetcode.com/problems/rotate-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/rotate-list.py
Remove Duplicates from Sorted List IIhttps://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-duplicates-from-sorted-list-ii.py
Remove Duplicates from Sorted Listhttps://leetcode.com/problems/remove-duplicates-from-sorted-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-duplicates-from-sorted-list.py
Reverse Linked List IIhttps://leetcode.com/problems/reverse-linked-list-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-linked-list-ii.py
Copy List with Random Pointerhttps://leetcode.com/problems/copy-list-with-random-pointer/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/copy-list-with-random-pointer.py
Intersection of Two Linked Listshttps://leetcode.com/problems/intersection-of-two-linked-lists/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/intersection-of-two-linked-lists.py
Remove Linked List Elementshttps://leetcode.com/problems/remove-linked-list-elements/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-linked-list-elements.py
Reverse Linked Listhttps://leetcode.com/problems/reverse-linked-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-linked-list.py
Palindrome Linked Listhttps://leetcode.com/problems/palindrome-linked-list/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/palindrome-linked-list.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/palindrome-linked-list.py
Delete Node in a Linked Listhttps://leetcode.com/problems/delete-node-in-a-linked-list/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/delete-node-in-a-linked-list.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/delete-node-in-a-linked-list.py
Valid Anagramhttps://leetcode.com/problems/valid-anagram/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/valid-anagram.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/valid-anagram.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-4
Valid Parentheseshttps://leetcode.com/problems/valid-parentheses/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/valid-parentheses.py
Longest Valid Parentheseshttps://leetcode.com/problems/longest-valid-parentheses/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-valid-parentheses.py
Simplify Pathhttps://leetcode.com/problems/simplify-path/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/simplify-path.py
Symmetric Treehttps://leetcode.com/problems/symmetric-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/symmetric-tree.py
Evaluate Reverse Polish Notationhttps://leetcode.com/problems/evaluate-reverse-polish-notation/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/evaluate-reverse-polish-notation.py
Min Stackhttps://leetcode.com/problems/min-stack/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/min-stack.py
Binary Search Tree Iteratorhttps://leetcode.com/problems/binary-search-tree-iterator/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-search-tree-iterator.py
Basic Calculatorhttps://leetcode.com/problems/basic-calculator/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/basic-calculator.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/basic-calculator.py
Basic Calculator IIhttps://leetcode.com/problems/basic-calculator-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/basic-calculator-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/basic-calculator-ii.py
Implement Queue using Stackshttps://leetcode.com/problems/implement-queue-using-stacks/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/implement-queue-using-stacks.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/implement-queue-using-stacks.py
Verify Preorder Sequence in Binary Search Treehttps://leetcode.com/problems/verify-preorder-sequence-in-binary-search-tree/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/verify-preorder-sequence-in-binary-search-tree.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/verify-preorder-sequence-in-binary-search-tree.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-5
Sliding Window Maximumhttps://leetcode.com/problems/sliding-window-maximum/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/sliding-window-maximum.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sliding-window-maximum.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-6
Merge k Sorted Listshttps://leetcode.com/problems/merge-k-sorted-lists/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/merge-k-sorted-lists.py
Ugly Number IIhttps://leetcode.com/problems/ugly-number-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/ugly-number-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/ugly-number-ii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-7
Binary Tree Inorder Traversalhttps://leetcode.com/problems/binary-tree-inorder-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-inorder-traversal.py
Recover Binary Search Treehttps://leetcode.com/problems/recover-binary-search-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/recover-binary-search-tree.py
Binary Tree Preorder Traversalhttps://leetcode.com/problems/binary-tree-preorder-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-preorder-traversal.py
Binary Tree Postorder Traversalhttps://leetcode.com/problems/binary-tree-postorder-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-postorder-traversal.py
Implement Trie (Prefix Tree)https://leetcode.com/problems/implement-trie-prefix-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/implement-trie-prefix-tree.py
Add and Search Word - Data structure design https://leetcode.com/problems/add-and-search-word-data-structure-design/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/add-and-search-word-data-structure-design.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/add-and-search-word-data-structure-design.py
Word Search IIhttps://leetcode.com/problems/word-search-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/word-search-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-search-ii.py
Invert Binary Treehttps://leetcode.com/problems/invert-binary-tree/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/invert-binary-tree.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/invert-binary-tree.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-8
Two Sumhttps://leetcode.com/problems/two-sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/two-sum.py
Longest Substring Without Repeating Charactershttps://leetcode.com/problems/longest-substring-without-repeating-characters/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-substring-without-repeating-characters.py
4 Sumhttps://leetcode.com/problems/4sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/4sum.py
Substring with Concatenation of All Wordshttps://leetcode.com/problems/substring-with-concatenation-of-all-words/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/substring-with-concatenation-of-all-words.py
Valid Sudokuhttps://leetcode.com/problems/valid-sudoku/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/valid-sudoku.py
Anagramshttps://leetcode.com/problems/anagrams/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/anagrams.py
Minimum Window Substringhttps://leetcode.com/problems/minimum-window-substring/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/minimum-window-substring.py
Max Points on a Linehttps://leetcode.com/problems/max-points-on-a-line/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/max-points-on-a-line.py
Longest Substring with At Most Two Distinct Charactershttps://leetcode.com/problems/longest-substring-with-at-most-two-distinct-characters/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/longest-substring-with-at-most-two-distinct-characters.py
Two Sum III - Data structure designhttps://leetcode.com/problems/two-sum-iii-data-structure-design/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/two-sum-iii-data-structure-design.py
Repeated DNA Sequenceshttps://leetcode.com/problems/repeated-dna-sequences/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/repeated-dna-sequences.py
Happy Numberhttps://leetcode.com/problems/happy-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/happy-number.py
Count Primeshttps://leetcode.com/problems/count-primes/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/count-primes.py
Contains Duplicatehttps://leetcode.com/problems/contains-duplicate/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/contains-duplicate.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/contains-duplicate.py
Contains Duplicate IIhttps://leetcode.com/problems/contains-duplicate-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/contains-duplicate-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/contains-duplicate-ii.py
Shortest Word Distance IIhttps://leetcode.com/problems/shortest-word-distance-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/shortest-word-distance-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/shortest-word-distance-ii.py
Strobogrammatic Numberhttps://leetcode.com/problems/strobogrammatic-number/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/strobogrammatic-number.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/strobogrammatic-number.py
Group Shifted Stringshttps://leetcode.com/problems/group-shifted-strings/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/group-shifted-strings.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/group-shifted-strings.py
Palindrome Permutationhttps://leetcode.com/problems/palindrome-permutation/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/palindrome-permutation.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/palindrome-permutation.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-9
LRU Cachehttps://leetcode.com/problems/lru-cache/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/lru-cache.py
Implement Stack using Queueshttps://leetcode.com/problems/implement-stack-using-queues/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/implement-stack-using-queues.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/implement-stack-using-queues.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-10
Reverse Integerhttps://leetcode.com/problems/reverse-integer/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reverse-integer.py
Palindrome Numberhttps://leetcode.com/problems/palindrome-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/palindrome-number.py
Integer to Romanhttps://leetcode.com/problems/integer-to-roman/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/integer-to-roman.py
Roman to Integerhttps://leetcode.com/problems/roman-to-integer/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/roman-to-integer.py
Divide Two Integershttps://leetcode.com/problems/divide-two-integers/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/divide-two-integers.py
Permutation Sequencehttps://leetcode.com/problems/permutation-sequence/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/permutation-sequence.py
Valid Numberhttps://leetcode.com/problems/valid-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/valid-number.py
Gray Codehttps://leetcode.com/problems/gray-code/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/gray-code.py
Fraction to Recurring Decimalhttps://leetcode.com/problems/fraction-to-recurring-decimal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/fraction-to-recurring-decimal.py
Excel Sheet Column Titlehttps://leetcode.com/problems/excel-sheet-column-title/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/excel-sheet-column-title.py
Excel Sheet Column Numberhttps://leetcode.com/problems/excel-sheet-column-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/excel-sheet-column-number.py
Factorial Trailing Zeroeshttps://leetcode.com/problems/factorial-trailing-zeroes/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/factorial-trailing-zeroes.py
Rectangle Areahttps://leetcode.com/problems/rectangle-area/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/rectangle-area.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/rectangle-area.py
Number of Digit Onehttps://leetcode.com/problems/number-of-digit-one/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/number-of-digit-one.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/number-of-digit-one.py
Strobogrammatic Number IIIhttps://leetcode.com/problems/strobogrammatic-number-iii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/strobogrammatic-number-iii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/strobogrammatic-number-iii.py
Add Digitshttps://leetcode.com/problems/add-digits/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/add-digits.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/add-digits.py
Ugly Numberhttps://leetcode.com/problems/ugly-number/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/ugly-number.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/ugly-number.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-11
Merge Two Sorted Listshttps://leetcode.com/problems/merge-two-sorted-lists/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/merge-two-sorted-lists.py
Merge Intervalshttps://leetcode.com/problems/merge-intervals/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/merge-intervals.py
Insert Intervalhttps://leetcode.com/problems/insert-interval/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/insert-interval.py
Sort Colorshttps://leetcode.com/problems/sort-colors/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sort-colors.py
Merge Sorted Arrayhttps://leetcode.com/problems/merge-sorted-array/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/merge-sorted-array.py
Insertion Sort Listhttps://leetcode.com/problems/insertion-sort-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/insertion-sort-list.py
Sort Listhttps://leetcode.com/problems/sort-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sort-list.py
Maximum Gaphttps://leetcode.com/problems/maximum-gap/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximum-gap.py
Largest Numberhttps://leetcode.com/problems/largest-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/largest-number.py
The Skyline Problemhttps://leetcode.com/problems/the-skyline-problem/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/the-skyline-problem.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/the-skyline-problem.py
Meeting Roomshttps://leetcode.com/problems/meeting-rooms/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/meeting-rooms.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/meeting-rooms.py
Meeting Rooms IIhttps://leetcode.com/problems/meeting-rooms-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/meeting-rooms-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/meeting-rooms-ii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-12
Remove Nth Node From End of Listhttps://leetcode.com/problems/remove-nth-node-from-end-of-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/remove-nth-node-from-end-of-list.py
Partition Listhttps://leetcode.com/problems/partition-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/partition-list.py
Linked List Cyclehttps://leetcode.com/problems/linked-list-cycle/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/linked-list-cycle.py
Linked List Cycle IIhttps://leetcode.com/problems/linked-list-cycle-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/linked-list-cycle-ii.py
Reorder Listhttps://leetcode.com/problems/reorder-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/reorder-list.py
Two Sum II - Input array is sortedhttps://leetcode.com/problems/two-sum-ii-input-array-is-sorted/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/two-sum-ii-input-array-is-sorted.py
3Sum Smallerhttps://leetcode.com/problems/3sum-smaller/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/3sum-smaller.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/3sum-smaller.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-13
Letter Combinations of a Phone Numberhttps://leetcode.com/problems/letter-combinations-of-a-phone-number/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/letter-combinations-of-a-phone-number.py
Permutationshttps://leetcode.com/problems/permutations/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/permutations.py
Permutations IIhttps://leetcode.com/problems/permutations-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/permutations-ii.py
Subsetshttps://leetcode.com/problems/subsets/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/subsets.py
Subsets IIhttps://leetcode.com/problems/subsets-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/subsets-ii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-14
Unique Binary Search Trees IIhttps://leetcode.com/problems/unique-binary-search-trees-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/unique-binary-search-trees-ii.py
Validate Binary Search Treehttps://leetcode.com/problems/validate-binary-search-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/validate-binary-search-tree.py
Same Treehttps://leetcode.com/problems/same-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/same-tree.py
Maximum Depth of Binary Treehttps://leetcode.com/problems/maximum-depth-of-binary-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximum-depth-of-binary-tree.py
Construct Binary Tree from Preorder and Inorder Traversalhttps://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/construct-binary-tree-from-preorder-and-inorder-traversal.py
Construct Binary Tree from Inorder and Postorder Traversalhttps://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/construct-binary-tree-from-inorder-and-postorder-traversal.py
Convert Sorted Array to Binary Search Treehttps://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/convert-sorted-array-to-binary-search-tree.py
Convert Sorted List to Binary Search Treehttps://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/convert-sorted-list-to-binary-search-tree.py
Balanced Binary Treehttps://leetcode.com/problems/balanced-binary-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/balanced-binary-tree.py
Minimum Depth of Binary Treehttps://leetcode.com/problems/minimum-depth-of-binary-tree/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/minimum-depth-of-binary-tree.py
Flatten Binary Tree to Linked Listhttps://leetcode.com/problems/flatten-binary-tree-to-linked-list/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/flatten-binary-tree-to-linked-list.py
Populating Next Right Pointers in Each Nodehttps://leetcode.com/problems/populating-next-right-pointers-in-each-node/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/populating-next-right-pointers-in-each-node.py
Binary Tree Maximum Path Sumhttps://leetcode.com/problems/binary-tree-maximum-path-sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-maximum-path-sum.py
Sum Root to Leaf Numbershttps://leetcode.com/problems/sum-root-to-leaf-numbers/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sum-root-to-leaf-numbers.py
Binary Tree Upside Downhttps://leetcode.com/problems/binary-tree-upside-down/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-upside-down.py
Different Ways to Add Parentheseshttps://leetcode.com/problems/different-ways-to-add-parentheses/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/different-ways-to-add-parentheses.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/different-ways-to-add-parentheses.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-15
Median of Two Sorted Arrayshttps://leetcode.com/problems/median-of-two-sorted-arrays/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/median-of-two-sorted-arrays.py
Search in Rotated Sorted Arrayhttps://leetcode.com/problems/search-in-rotated-sorted-array/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-in-rotated-sorted-array.py
Search for a Rangehttps://leetcode.com/problems/search-for-a-range/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-for-a-range.py
Search Insert Positionhttps://leetcode.com/problems/search-insert-position/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-insert-position.py
Pow(x, n)https://leetcode.com/problems/powx-n/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/powx-n.py
Sqrt(x)https://leetcode.com/problems/sqrtx/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sqrtx.py
Search a 2D Matrixhttps://leetcode.com/problems/search-a-2d-matrix/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-a-2d-matrix.py
Search in Rotated Sorted Array IIhttps://leetcode.com/problems/search-in-rotated-sorted-array-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/search-in-rotated-sorted-array-ii.py
Find Minimum in Rotated Sorted Arrayhttps://leetcode.com/problems/find-minimum-in-rotated-sorted-array/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/find-minimum-in-rotated-sorted-array.py
Find Minimum in Rotated Sorted Array IIhttps://leetcode.com/problems/find-minimum-in-rotated-sorted-array-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/find-minimum-in-rotated-sorted-array-ii.py
Find Peak Elementhttps://leetcode.com/problems/find-peak-element/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/find-peak-element.py
Count Complete Tree Nodeshttps://leetcode.com/problems/count-complete-tree-nodes/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/count-complete-tree-nodes.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/count-complete-tree-nodes.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-16
Contains Duplicate IIIhttps://leetcode.com/problems/contains-duplicate-iii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/contains-duplicate-iii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/contains-duplicate-iii.py
Kth Smallest Element in a BSThttps://leetcode.com/problems/kth-smallest-element-in-a-bst/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/kth-smallest-element-in-a-bst.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/kth-smallest-element-in-a-bst.py
Lowest Common Ancestor of a Binary Search Treehttps://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/lowest-common-ancestor-of-a-binary-search-tree.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/lowest-common-ancestor-of-a-binary-search-tree.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-17
Binary Tree Level Order Traversalhttps://leetcode.com/problems/binary-tree-level-order-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-level-order-traversal.py
Binary Tree Level Order Traversal IIhttps://leetcode.com/problems/binary-tree-level-order-traversal-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-level-order-traversal-ii.py
Binary Tree Zigzag Level Order Traversalhttps://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-zigzag-level-order-traversal.py
Populating Next Right Pointers in Each Node IIhttps://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/populating-next-right-pointers-in-each-node-ii.py
Word Ladderhttps://leetcode.com/problems/word-ladder/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-ladder.py
Surrounded Regionshttps://leetcode.com/problems/surrounded-regions/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/surrounded-regions.py
Clone Graphhttps://leetcode.com/problems/clone-graph/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/clone-graph.py
Course Schedulehttps://leetcode.com/problems/course-schedule/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/course-schedule.py
Course Schedule IIhttps://leetcode.com/problems/course-schedule-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/course-schedule-ii.py
Graph Valid Treehttps://leetcode.com/problems/graph-valid-tree/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/graph-valid-tree.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/graph-valid-tree.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-18
Generate Parentheseshttps://leetcode.com/problems/generate-parentheses/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/generate-parentheses.py
Sudoku Solverhttps://leetcode.com/problems/sudoku-solver/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/sudoku-solver.py
Combination Sumhttps://leetcode.com/problems/combination-sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/combination-sum.py
Combination Sum IIhttps://leetcode.com/problems/combination-sum-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/combination-sum-ii.py
N-Queenshttps://leetcode.com/problems/n-queens/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/n-queens.py
N-Queens-IIhttps://leetcode.com/problems/n-queens-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/n-queens-ii.py
Combinationshttps://leetcode.com/problems/combinations/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/combinations.py
Word Searchhttps://leetcode.com/problems/word-search/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-search.py
Restore IP Addresseshttps://leetcode.com/problems/restore-ip-addresses/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/restore-ip-addresses.py
Path Sumhttps://leetcode.com/problems/path-sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/path-sum.py
Path Sum IIhttps://leetcode.com/problems/path-sum-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/path-sum-ii.py
Palindrome Partitioninghttps://leetcode.com/problems/palindrome-partitioning/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/palindrome-partitioning.py
Binary Tree Right Side Viewhttps://leetcode.com/problems/binary-tree-right-side-view/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-right-side-view.py
Number of Islandshttps://leetcode.com/problems/number-of-islands/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/number-of-islands.py
Combination Sum IIIhttps://leetcode.com/problems/combination-sum-iii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/combination-sum-iii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/combination-sum-iii.py
Lowest Common Ancestor of a Binary Treehttps://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/lowest-common-ancestor-of-a-binary-tree.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/lowest-common-ancestor-of-a-binary-tree.py
Strobogrammatic Number IIhttps://leetcode.com/problems/strobogrammatic-number-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/strobogrammatic-number-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/strobogrammatic-number-ii.py
Count Univalue Subtreeshttps://leetcode.com/problems/count-univalue-subtrees
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/count-univalue-subtrees.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/count-univalue-subtrees.py
Factor Combinationshttps://leetcode.com/problems/factor-combinations
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/factor-combinations.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/factor-combinations.py
Binary Tree Pathshttps://leetcode.com/problems/binary-tree-paths/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/binary-tree-paths.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/binary-tree-paths.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-19
Regular Expression Matchinghttps://leetcode.com/problems/regular-expression-matching/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/regular-expression-matching.py
Maximum Subarrayhttps://leetcode.com/problems/maximum-subarray/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximum-subarray.py
Unique Pathshttps://leetcode.com/problems/unique-paths/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/unique-paths.py
Unique Paths IIhttps://leetcode.com/problems/unique-paths-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/unique-paths-ii.py
Minimum Path Sumhttps://leetcode.com/problems/minimum-path-sum/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/minimum-path-sum.py
Climbing Stairshttps://leetcode.com/problems/climbing-stairs/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/climbing-stairs.py
Edit Distancehttps://leetcode.com/problems/edit-distance/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/edit-distance.py
Maximal Rectanglehttps://leetcode.com/problems/maximal-rectangle/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximal-rectangle.py
Scramble Stringhttps://leetcode.com/problems/scramble-string/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/scramble-string.py
Decode Wayshttps://leetcode.com/problems/decode-ways/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/decode-ways.py
Unique Binary Search Treeshttps://leetcode.com/problems/unique-binary-search-trees/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/unique-binary-search-trees.py
Interleaving Stringhttps://leetcode.com/problems/interleaving-string/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/interleaving-string.py
Distinct Subsequenceshttps://leetcode.com/problems/distinct-subsequences/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/distinct-subsequences.py
Trianglehttps://leetcode.com/problems/triangle/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/triangle.py
Best Time to Buy and Sell Stock IIIhttps://leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/best-time-to-buy-and-sell-stock-iii.py
Palindrome Partitioning IIhttps://leetcode.com/problems/palindrome-partitioning-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/palindrome-partitioning-ii.py
Word Breakhttps://leetcode.com/problems/word-break/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-break.py
Word Break IIhttps://leetcode.com/problems/word-break-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-break-ii.py
Maximum Product Subarrayhttps://leetcode.com/problems/maximum-product-subarray/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximum-product-subarray.py
Dungeon Gamehttps://leetcode.com/problems/dungeon-game/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/dungeon-game.py
Best Time to Buy and Sell Stock IVhttps://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/best-time-to-buy-and-sell-stock-iv.py
House Robberhttps://leetcode.com/problems/house-robber/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/house-robber.py
House Robber IIhttps://leetcode.com/problems/house-robber-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/house-robber-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/house-robber-ii.py
Maximal Squarehttps://leetcode.com/problems/maximal-square/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/maximal-square.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/maximal-square.py
Paint Househttps://leetcode.com/problems/paint-house/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/paint-house.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/paint-house.py
Paint House IIhttps://leetcode.com/problems/paint-house-ii/
C++https://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/C++/paint-house-ii.cpp
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/paint-house-ii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-20
Word Ladder IIhttps://leetcode.com/problems/word-ladder-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/word-ladder-ii.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-21
Container With Most Waterhttps://leetcode.com/problems/container-with-most-water/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/container-with-most-water.py
Trapping Rain Waterhttps://leetcode.com/problems/trapping-rain-water/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/trapping-rain-water.py
Wildcard Matchinghttps://leetcode.com/problems/wildcard-matching/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/wildcard-matching.py
Jump Game IIhttps://leetcode.com/problems/jump-game-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/jump-game-ii.py
Jump Gamehttps://leetcode.com/problems/jump-game/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/jump-game.py
Largest Rectangle in Histogramhttps://leetcode.com/problems/largest-rectangle-in-histogram/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/largest-rectangle-in-histogram.py
Best Time to Buy and Sell Stock IIhttps://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/best-time-to-buy-and-sell-stock-ii.py
Gas Stationhttps://leetcode.com/problems/gas-station/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/gas-station.py
Candyhttps://leetcode.com/problems/candy/
Pythonhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Python/candy.py
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-22
Combine Two Tableshttps://leetcode.com/problems/combine-two-tables/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/combine-two-tables.sql
Second Highest Salaryhttps://leetcode.com/problems/second-highest-salary/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/second-highest-salary.sql
Nth Highest Salaryhttps://leetcode.com/problems/nth-highest-salary/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/nth-highest-salary.sql
Rank Scoreshttps://leetcode.com/problems/rank-scores/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/rank-scores.sql
Consecutive Numbershttps://leetcode.com/problems/consecutive-numbers/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/consecutive-numbers.sql
Employees Earning More Than Their Managershttps://leetcode.com/problems/employees-earning-more-than-their-managers/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/employees-earning-more-than-their-managers.sql
Duplicate Emailshttps://leetcode.com/problems/duplicate-emails/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/duplicate-emails.sql
Customers Who Never Orderhttps://leetcode.com/problems/customers-who-never-order/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/customers-who-never-order.sql
Department Highest Salaryhttps://leetcode.com/problems/department-highest-salary/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/department-highest-salary.sql
Department Top Three Salarieshttps://leetcode.com/problems/department-top-three-salaries/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/department-top-three-salaries.sql
Delete Duplicate Emailshttps://leetcode.com/problems/delete-duplicate-emails/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/delete-duplicate-emails.sql
Rising Temperaturehttps://leetcode.com/problems/rising-temperature/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/rising-temperature.sql
Trips and Users https://leetcode.com/problems/trips-and-users/
MySQLhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/MySQL/trips-and-users.sql
https://patch-diff.githubusercontent.com/polya20/LeetCode#-problem-----------solution---------time------------space------------difficulty-----tag-----------note-23
Word Frequencyhttps://leetcode.com/problems/word-frequency/
Shellhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Shell/word-frequency.sh
Valid Phone Numbershttps://leetcode.com/problems/valid-phone-numbers/
Shellhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Shell/valid-phone-numbers.sh
Transpose Filehttps://leetcode.com/problems/transpose-file/
Shellhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Shell/transpose-file.sh
Tenth Linehttps://leetcode.com/problems/tenth-line/
Shellhttps://patch-diff.githubusercontent.com/polya20/LeetCode/blob/master/Shell/tenth-line.sh
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