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Leetcode Python Solution. Those who Want to learn Python From Scratch check out the Website linked below. Good Luck.

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Name		Name	Last commit message	Last commit date
Latest commit History 775 Commits
.gitignore		.gitignore
001 Two Sum.py		001 Two Sum.py
002 Median of Two Sorted Arrays.py		002 Median of Two Sorted Arrays.py
003 Longest Substring Without Repeating Characters.py		003 Longest Substring Without Repeating Characters.py
004 Add Two Numbers.py		004 Add Two Numbers.py
005 Longest Palindromic Substring.py		005 Longest Palindromic Substring.py
006 ZigZag Conversion.py		006 ZigZag Conversion.py
007 Reverse Integer.py		007 Reverse Integer.py
008 String to Integer (atoi).py		008 String to Integer (atoi).py
009 Palindrome Number.py		009 Palindrome Number.py
010 Container With Most Water.py		010 Container With Most Water.py
011 Regular Expression Matching.py		011 Regular Expression Matching.py
012 Integer to Roman.py		012 Integer to Roman.py
013 Roman to Integer.py		013 Roman to Integer.py
014 3Sum.py		014 3Sum.py
015 Longest Common Prefix.py		015 Longest Common Prefix.py
016 3Sum Closest.py		016 3Sum Closest.py
017 Letter Combinations of a Phone Number.py		017 Letter Combinations of a Phone Number.py
018 4Sum.py		018 4Sum.py
019 Remove Nth Node From End of List.py		019 Remove Nth Node From End of List.py
020 Valid Parentheses.py		020 Valid Parentheses.py
021 Generate Parentheses py3.py		021 Generate Parentheses py3.py
021 Generate Parentheses.py		021 Generate Parentheses.py
022 Merge k Sorted Lists.py		022 Merge k Sorted Lists.py
023 Swap Nodes in Pairs.py		023 Swap Nodes in Pairs.py
024 Reverse Nodes in k-Group.py		024 Reverse Nodes in k-Group.py
025 Remove Element.py		025 Remove Element.py
026 Remove Duplicates from Sorted Array.py		026 Remove Duplicates from Sorted Array.py
027 Divide Two Integers.py		027 Divide Two Integers.py
028 Implement strStr().py		028 Implement strStr().py
029 Substring with Concatenation of All Words.py		029 Substring with Concatenation of All Words.py
030 Next Permutation.py		030 Next Permutation.py
031 Longest Valid Parentheses.py		031 Longest Valid Parentheses.py
032 Search for a Range.py		032 Search for a Range.py
033 Search in Rotated Sorted Array.py		033 Search in Rotated Sorted Array.py
034 Search Insert Position.py		034 Search Insert Position.py
035 Valid Sudoku.py		035 Valid Sudoku.py
036 Sudoku Solver.py		036 Sudoku Solver.py
037 Count and Say.py		037 Count and Say.py
038 Combination Sum II py3.py		038 Combination Sum II py3.py
038 Combination Sum II.py		038 Combination Sum II.py
039 Combination Sum py3.py		039 Combination Sum py3.py
039 Combination Sum.py		039 Combination Sum.py
040 First Missing Positive.py		040 First Missing Positive.py
041 Trapping Rain Water py3.py		041 Trapping Rain Water py3.py
041 Trapping Rain Water.py		041 Trapping Rain Water.py
042 Multiply Strings.py		042 Multiply Strings.py
043 Wildcard Matching.py		043 Wildcard Matching.py
044 Jump Game II.py		044 Jump Game II.py
045 Permutation.py		045 Permutation.py
046 Permutations II.py		046 Permutations II.py
047 Rotate Image.py		047 Rotate Image.py
048 Pow(x, n).py		048 Pow(x, n).py
049 Anagrams.py		049 Anagrams.py
050 N-Queens.py		050 N-Queens.py
051 N-Queens II.py		051 N-Queens II.py
052 Maximum Subarray.py		052 Maximum Subarray.py
053 Spiral Matrix.py		053 Spiral Matrix.py
054 Jump Game.py		054 Jump Game.py
055 Merge Intervals.py		055 Merge Intervals.py
056 Length of Last Word.py		056 Length of Last Word.py
057 Insert Interval.py		057 Insert Interval.py
058 Spiral Matrix II.py		058 Spiral Matrix II.py
059 Rotate List.py		059 Rotate List.py
060 Permutation Sequence.py		060 Permutation Sequence.py
061 Unique Paths.py		061 Unique Paths.py
062 Minimum Path Sum.py		062 Minimum Path Sum.py
063 Unique Paths II.py		063 Unique Paths II.py
064 Merge Two Sorted Lists.py		064 Merge Two Sorted Lists.py
065 Plus One.py		065 Plus One.py
066 Valid Number.py		066 Valid Number.py
067 Add Binary.py		067 Add Binary.py
068 Simplify Path.py		068 Simplify Path.py
068 Text Justification py3.py		068 Text Justification py3.py
069 Climbing Stairs.py		069 Climbing Stairs.py
070 Text Justification.py		070 Text Justification.py
071 Sqrt(x).py		071 Sqrt(x).py
072 Edit Distance.py		072 Edit Distance.py
073 Set Matrix Zeroes.py		073 Set Matrix Zeroes.py
074 Search a 2D Matrix.py		074 Search a 2D Matrix.py
075 Sort Colors.py		075 Sort Colors.py
076 Minimum Window Substring.py		076 Minimum Window Substring.py
077 Word Search.py		077 Word Search.py
078 Subsets.py		078 Subsets.py
079 Combinations.py		079 Combinations.py
079 Word Search py3.py		079 Word Search py3.py
080 Search in Rotated Sorted Array II.py		080 Search in Rotated Sorted Array II.py
081 Remove Duplicates from Sorted Array II.py		081 Remove Duplicates from Sorted Array II.py
082 Largest Rectangle in Histogram.py		082 Largest Rectangle in Histogram.py
083 Remove Duplicates from Sorted List II.py		083 Remove Duplicates from Sorted List II.py
084 Remove Duplicates from Sorted List.py		084 Remove Duplicates from Sorted List.py
085 Maximal Rectangle.py		085 Maximal Rectangle.py
086 Scramble String.py		086 Scramble String.py
087 Partition List.py		087 Partition List.py
088 Merge Sorted Array.py		088 Merge Sorted Array.py
089 Gray Code.py		089 Gray Code.py
090 Subsets II.py		090 Subsets II.py
091 Decode Ways.py		091 Decode Ways.py
092 Reverse Linked List II py3.py		092 Reverse Linked List II py3.py
092 Reverse Linked List II.py		092 Reverse Linked List II.py

Repository files navigation

leetcode_Python

copyRight@Rajeev Ranjan

Links:

Websites
https://www.python.org/doc/ (Documentation Releases by Version)
https://www.python.org/downloads/ (Download the latest source release)
https://docs.python.org/3/tutorial/ (The Python Tutorial)
https://www.python.org/about/gettingstarted/ (Python For Beginners)
https://docs.python.org/3/library/ (The Python Standard Library)
https://wiki.python.org/moin/PythonPeriodicals (PythonPeriodicals)
https://packaging.python.org/ (Python Packaging User Guide)
https://pyvideo.org/ (Python related videos)
https://docs.python.org/3/ (Python 3.8.6rc1 documentation)

Notes:

Important
Python is an interpreted, high-level and general-purpose programming language. Created by Guido van Rossum and first released in 1991, Python's design philosophy emphasizes code readability with its notable use of significant whitespace.
Typing discipline: Duck, dynamic, gradual (since 3.5)
Designed by: Guido van Rossum
OS: Linux, macOS, Windows Vista (and newer) and more
Filename extensions: .py,.pyi,.pyc,.pyd,.pyo (prior to 3.5),.pyw,.pyz (since 3.5)

Table

#	Title	Solution	Difficulty	Tag
1	Two Sum	C++	Easy	Array / Hash Table
2	Add Two Numbers	C++	Medium	Linked List
3	Longest Substring Without Repeating Characters	C++	Medium	Hash Table / Two Pointers
4	Median of Two Sorted Arrays	C++	Hard	Array / Binary Search
5	Longest Palindromic Substring	C++	Medium	String
6	ZigZag Conversion	C++	Medium	String
7	Reverse Integer	C++	Easy	Math
8	String to Integer (atoi)	C++	Medium	String
9	Palindrome Number	C++	Easy	Math
10	Regular Expression Matching	C++	Hard	String / Dynamic Programming / Backtracking
11	Container With Most Water	C++	Medium	Array / Two Pointers
12	Integer to Roman	C++	Medium	String
13	Roman to Integer	C++	Easy	String
14	Longest Common Prefix	C++	Easy	String
15	3Sum	C++	Medium	Array / Two Pointers
16	3Sum Closest	C++	Medium	Array / Two Pointers
17	Letter Combinations of a Phone Number	C++	Medium	Backtracking / String
18	4Sum	C++	Medium	Array
19	Remove Nth Node From End of List	C++	Medium	Linked List / Two Pointers
20	Valid Parentheses	C++	Easy	Stack
21	Merge Two Sorted Lists	C++	Easy	Linked List
22	Generate Parentheses	C++	Medium	String / Backtracking
23	Merge k Sorted Lists	C++	Hard	Linked List / Heap
24	Swap Nodes in Pairs	C++	Medium	Linked List
25	Reverse Nodes in k-Group	C++	Hard	Linked List
26	Remove Duplicates from Sorted Array	C++	Easy	Array / Two Pointers
27	Remove Element	C++	Easy	Array / Two Pointers
28	Implement strStr()	C++	Easy	String
29	Implement strStr()	C++	Easy	String
31	Next Permutation	C++	Medium	Array
33	Search in Rotated Sorted Array	C++	Medium	Array / Binary Search
34	Search for a Range	C++	Medium	Array / Binary Search
35	Search Insert Position	C++	Easy	Array / Binary Search
36	Valid Sudoku	C++	Medium	Hash Table
37	Sudoku Solver	C++	Medium	Hash Table
38	Count and Say	C++	Easy	String
39	Combination Sum	C++	Medium	Array / Backtracking
40	Combination Sum II	C++	Medium	Array / Backtracking
41	First Missing Positive	C++	Hard	Array
42	Trapping Rain Water	C++	Hard	Array / Two Pointers / Stack
43	Multiply Strings	C++	Medium	String
44	Wildcard Matching	C++	Hard	String / Backtracking / Greedy
45	Jump Game II	C++	Hard	Array / Greedy
46	Permutations	C++	Medium	Backtracking
47	Permutations II	C++	Medium	Backtracking
48	Rotate Image	C++	Medium	Matrix
49	Group Anagrams	C++	Medium	Hash Table / String
50	Pow(x, n)	C++	Medium	Binary Search
51	Pow(x, n)	C++	Medium	Binary Search
52	Pow(x, n)	C++	Medium	Binary Search
53	Maximum Subarray	C++	Easy	Dynamic Programming / Array
54	Spiral Matrix	C++	Medium	Array
55	Jump Game	C++	Medium	Array / Greedy
56	Merge Intervals	C++	Medium	Array / Sort
57	Insert Interval	C++	Hard	Array / Sort
58	Length of Last Word	C++	Easy	String
59	Spiral Matrix II	C++	Medium	Array
60	Permutation Sequence	C++	Medium	Backtracking / Math
61	Rotate List	C++	Medium	Linked List / Two Pointers
62	Unique Paths	C++	Medium	Array / Dynamic Programming
63	Unique Paths II	C++	Medium	Array / Dynamic Programming
64	Minimum Path Sum	C++	Medium	Array / Dynamic Programming
65	Valid Number	C++	Medium	Array / Dynamic Programming
66	Plus One	C++	Easy	Array / Math
67	Add Binary	C++	Easy	String
68	Text Justification	C++	Hard	String
69	Sqrt(x)	C++	Easy	Binary Search / Math
70	Climbing Stairs	C++	Easy	Dynamic Programming
71	Simplify Path	C++	Medium	Stack / String
72	Edit Distance	C++	Medium	Stack / String
73	Set Matrix Zeroes	C++	Medium	Array
74	Search a 2D Matrix	C++	Medium	Array / Binary Search
75	Sort Colors	C++	Medium	Array / Two Pointers
76	Minimum Window Substring	C++	Hard	Hash Table / Two pointers / String
78	Subsets	C++	Medium	Array / Backtracking
79	Word Search	C++	Medium	Matrix / Backtracking
80	Remove Duplicates from Sorted Array II	C++	Medium	Array / Two Pointers
82	Remove Duplicates from Sorted List II	C++	Medium	Linked List
83	Remove Duplicates from Sorted List	C++	Easy	Linked List
84	Largest Rectangle in Histogram	C++	Hard	Array
85	Maximal Rectangle	C++	Hard	Array
86	Partition List	C++	Medium	Linked List
88	Merge Sorted Array	C++	Easy	Array / Two Pointers
90	Subsets II	C++	Medium	Array / Backtracking
91	Decode Ways	C++	Medium	Dynamic Programming / String
92	Reverse Linked List II	C++	Medium	Linked List
94	Binary Tree Inorder Traversal	C++	Medium	Tree / Stack
95	Unique Binary Search Trees II	C++	Medium	Tree
96	Unique Binary Search Trees	C++	Hard	Tree / DFS
97	Interleaving String	C++	Hard	Tree / DFS
98	Validate Binary Search Tree	C++	Medium	Tree
99	Recover Binary Search Tree	C++	Hard	Tree / DFS
100	Same Tree	C++	Easy	Tree / DFS
101	Symmetric Tree	C++	Easy	Tree
102	Binary Tree Level Order Traversal	C++	Medium	Tree / DFS / BFS
103	Binary Tree Zigzag Level Order Traversal	C++	Medium	Tree / BFS
104	Maximum Depth of Binary Tree	C++	Easy	Tree
105	Construct Binary Tree from Preorder and Inorder Traversal	C++	Medium	Array / Tree / DFS
106	Construct Binary Tree from Inorder and Postorder Traversal	C++	Medium	Linked List / DFS
107	Binary Tree Level Order Traversal II	C++	Easy	Tree
108	Convert Sorted Array to Binary Search Tree	C++	Easy	Tree / DFS
109	Convert Sorted List to Binary Search Tree	C++	Medium	Linked List / DFS
110	Balanced Binary Tree	C++	Easy	Tree / DFS
111	Minimum Depth of Binary Tree	C++	Easy	Tree
112	Path Sum	C++	Easy	Tree / DFS
113	Path Sum II	C++	Medium	Tree / DFS
114	Flatten Binary Tree to Linked List	C++	Medium	Tree / DFS
116	Populating Next Right Pointers in Each Node	C++	Medium	Tree / BFS
117	Populating Next Right Pointers in Each Node II	C++	Medium	Tree / Level-order Traversal
118	Pascal's Triangle	C++	Easy	Array
119	Pascal's Triangle II	C++	Easy	Array
120	Triangle	C++	Medium	Array / Dynamic Programming
121	Best Time to Buy and Sell Stock	C++	Easy	Array / Dynamic Programming
122	Best Time to Buy and Sell Stock	C++	Hard	Tree / DFS
123	Best Time to Buy and Sell Stock	C++	Hard	Tree / DFS
124	Binary Tree Maximum Path Sum	C++	Hard	Tree / DFS
125	Valid Palindrome	C++	Easy	String / Two Pointers
126	Word Ladder	C++	Hard	Array / Unoin Find
127	Word Ladder	C++	Medium	String / BFS
128	Longest Consecutive Sequence	C++	Hard	Array / Unoin Find
129	Sum Root to Leaf Numbers	C++	Medium	Tree / DFS / BFS
130	Surrounded Regions	C++	Medium	DFS / BFS / Union Find
131	Palindrome Partitioning	C++	Medium	Backtracking
132	Palindrome Partitioning	C++	Easy	Bit Manipulation
133	Clone Graph	C++	Medium	Graph / DFS / BFS
134	Gas Station	C++	Medium	Greedy
136	Single Number	C++	Easy	Bit Manipulation
137	Single Numberll	C++	Medium	Dynamic Programming
138	Copy List with Random Pointer	C++	Medium	Hash Table / Linked List
139	Word Break	C++	Medium	Dynamic Programming
140	Word BreakII	C++	Medium	Dynamic Programming
141	Linked List Cycle	C++	Easy	Linked List / Two Pointers
142	Linked List Cycle II	C++	Medium	Linked List / Two Pointers
143	Reorder List	C++	Medium	Linked List
144	Binary Tree Preorder Traversal	C++	Medium	Tree / Stack
145	Binary Tree Postorder Traversal	C++	Hard	Tree / Stack
146	LRU Cache	C++	Hard	Design
147	Insertion Sort List	C++	Easy	Stack / Design
148	Sort List	C++	Easy	Stack / Design
149	Max Points on a Line	C++	Easy	Stack / Design
151	Reverse Words in a String	C++	Medium	String
152	Maximum Product Subarray	C++	Hard	String / Two Pointers
153	Find Minimum in Rotated Sorted Array	C++	Hard	String / Two Pointers
154	Find Minimum in Rotated Sorted Array	C++	Hard	String / Two Pointers
155	Min Stack	C++	Easy	Stack / Design
157	Read N Characters Given Read4	C++	Easy	String
158	Read N Characters Given Read4 II - Call multiple times	C++	Hard	String
159	Longest Substring with At Most Two Distinct Characters	C++	Hard	String / Two Pointers
160	Intersection of Two Linked Lists	C++	Medium	String
161	One Edit Distance	C++	Medium	String
162	Find Peak Element	C++	Medium	Binary Search
163	Missing Ranges	C++	Medium	Array
168	Excel Sheet Column Title	C++	Easy	Math
169	Majority Element	C++	Easy	Array
171	Excel Sheet Column Number	C++	Easy	Math
173	Binary Search Tree Iterator	C++	Medium	Tree / Stack / Design
186	Reverse Words in a String II	C++	Medium	String
191	Number of 1 Bits	C++	Easy	Bit Manipulation
198	House Robber	C++	Easy	Dynamic Programming
200	Number of Islands	C++	Medium	BFS / Union Find
205	Isomorphic Strings	C++	Easy	Hash Table
206	Reverse Linked List	C++	Easy	Linked List
207	Course Schedule	C++	Medium	Graph / BFS / Topological Sort
208	Implement Trie (Prefix Tree)	C++	Medium	Trie / Design
209	Minimum Size Subarray Sum	C++	Medium	Array / Two Pointers
210	Course Schedule II	C++	Medium	Graph / BFS / Topological Sort
211	Add and Search Word - Data structure design	C++	Medium	Design / Trie
212	Word Search II	C++	Hard	Backtracking / Trie
214	Shortest Palindrome	C++	Hard	String
215	Kth Largest Element in an Array	C++	Medium	Sort / Partition
221	Maximal Square	C++	Medium	Dynamic Programming / BFS
223	Rectangle Area	C++	Medium	Math
224	Basic Calculator	C++	Hard	String / Stack
226	Invert Binary Tree	C++	Easy	Tree
227	Basic Calculator II	C++	Medium	String
228	Summary Ranges	C++	Medium	Array
229	Majority Element II	C++	Medium	Array
230	Kth Smallest Element in a BST	C++	Medium	Tree
231	Power of Two	C++	Easy	Bit Manipulation
234	Palindrome Linked List	C++	Easy	Linked List / Two Pointers
235	Lowest Common Ancestor of a Binary Search Tree	C++	Easy	Tree
236	Lowest Common Ancestor of a Binary Tree	C++	Medium	Tree
238	Product of Array Except Self	C++	Medium	Array
239	Sliding Window Maximum	C++	Hard	Heap
240	Search a 2D Matrix II	C++	Medium	Binary Search / Divide and Conquer
244	Shortest Word Distance II	C++	Medium	Hash Table / Design
246	Strobogrammatic Number	C++	Easy	Hash Table / Math
247	Strobogrammatic Number II	C++	Medium	Math / Recursion
249	Group Shifted Strings	C++	Medium	String
251	Flatten 2D Vector	C++	Medium	Design
252	Meeting Rooms	C++	Easy	Sort
253	Meeting Rooms II	C++	Medium	Heap / Sort
255	Verify Preorder Sequence in Binary Search Tree	C++	Medium	Stack / Tree
257	Binary Tree Paths	C++	Easy	Tree / DFS / BFS
258	Add Digits	C++	Easy	Math
259	3Sum Smaller	C++	Medium	Array / Two Pointers
261	Graph Valid Tree	C++	Medium	Graph / BFS / DFS / Union Find
263	Ugly Number	C++	Easy	Math
264	Ugly Number II	C++	Medium	Dynamic Programming / Math
266	Palindrome Permutation	C++	Easy	Hash Table
267	Palindrome Permutation II	C++	Medium	Backtracking
268	Missing Number	C++	Easy	Array / Bit Manipulation
269	Alien Dictionary	C++	Hard	Graph / Topological Sort
270	Closest Binary Search Tree Value	C++	Easy	Tree / Binary Search
271	Encode and Decode Strings	C++	Medium	String / Design
272	Closest Binary Search Tree Value II	C++	Hard	Tree / Stack
273	Integer to English Words	C++	Hard	String
274	H-Index	C++	Medium	Sort
275	H-Index II	C++	Medium	Binary Search
276	Paint Fence	C++	Easy	Dynamic Programming
277	Find the Celebrity	C++	Medium	Array
278	First Bad Version	C++	Easy	Binary Search
279	Perfect Squares	C++	Medium	Math / Dynamic Programming
280	Wiggle Sort	C++	Easy	Array
281	Zigzag Iterator	C++	Medium	Design
282	Expression Add Operators	C++	Hard	Divide and Conquer
283	Move Zeroes	C++	Easy	Array / Two Pointers
284	Peeking Iterator	C++	Medum	Design
285	Inorder Successor in BST	C++	Medium	Tree
286	Walls and Gates	C++	Medium	BFS
289	Game of Life	C++	Medium	Array
290	Word Pattern	C++	Easy	Hash Table
293	Flip Game	C++	Easy	String
294	Flip Game II	C++	Medium	Backtracking
295	Find Median from Data Stream	C++	Hard	Heap / Design
297	Serialize and Deserialize Binary Tree	C++	Hard	Tree / Design
298	Binary Tree Longest Consecutive Sequence	C++	Medium	Tree
300	Longest Increasing Subsequence	C++	Medium	Binary Search / Dynamic Programming
301	Remove Invalid Parentheses	C++	Hard	Backtracking / DFS / BFS
303	Range Sum Query - Immutable	C++	Easy	Dynamic Programming
304	Range Sum Query 2D - Immutable	C++	Medium	Dynamic Programming
305	Number of Islands II	C++	Hard	Union Find
307	Range Sum Query - Mutable	C++	Medium	Segment Tree
309	Best Time to Buy and Sell Stock with Cooldown	C++	Medium	Dynamic Programming
310	Minimum Height Trees	C++	Medium	BFS/ Graph
311	Sparse Matrix Multiplication	C++	Medium	Matrix
313	Super Ugly Number	C++	Medium	Dynamic Programming / Math
314	Binary Tree Vertical Order Traversal	C++	Medium	BFS
315	Count of Smaller Numbers After Self	C++	Hard	Divide and Conqur / Binary Search Tree
317	Shortest Distance from All Buildings	C++	Hard	BFS
318	Maximum Product of Word Lengths	C++	Medium	Bit Manipulation
323	Number of Connected Components in an Undirected Graph	C++	Medium	Graph / Union Find / BFS / DFS
325	Maximum Size Subarray Sum Equals k	C++	Medium	Array / Hash Table
329	Longest Increasing Path in a Matrix	C++	Hard	DFS / Memorization
331	Verify Preorder Serialization of a Binary Tree	C++	Medium	Stack
332	Reconstruct Itinerary	C++	Medium	Graph / DFS
333	Largest BST Subtree	C++	Medium	Tree
334	Increasing Triplet Subsequence	C++	Medium	Array
336	Palindrome Pairs	C++	Hard	Hash Table / String / Trie
339	Nested List Weight Sum	C++	Easy	DFS
340	Longest Substring with At Most K Distinct Characters	C++	Hard	Hash Table / String
341	Flatten Nested List Iterator	C++	Medium	Stack / Design
344	Reverse String	C++	Easy	String
347	Top K Frequent Elements	C++	Medium	Hash Table / Heap
348	Design Tic-Tac-Toe	C++	Medium	Design
351	Android Unlock Patterns	C++	Medium	DFS / Dynamic Programming
354	Russian Doll Envelopes	C++	Hard	Binary Search / Dynamic Programming
355	Design Twitter	C++	Medium	Hash Table / Design
359	Logger Rate Limiter	C++	Easy	Hash Table / Design
360	Sort Transformed Array	C++	Medium	Math / Two Pointers
361	Bomb Enemy	C++	Medium	Dynamic Programming
362	Design Hit Counter	C++	Medium	Design
364	Nested List Weight Sum II	C++	Medium	DFS
369	Plus One Linked List	C++	Medium	Linked List
373	Find K Pairs with Smallest Sums	C++	Medium	Heap
377	Combination Sum IV	C++	Medium	Dynamic Programming
378	Kth Smallest Element in a Sorted Matrix	C++	Medium	Binary Search / Heap
380	Insert Delete GetRandom O(1)	C++	Medium	Hash Table / Design
382	Linked List Random Node	C++	Medium	Reservoir Sampling
394	Decode String	C++	Medium	String / DFS
398	Random Pick Index	C++	Medium	Reservoir Sampling
399	Evaluate Division	C++	Medium	Graph
402	Remove K Digits	C++	Medium	Greedy
404	Sum of Left Leaves	C++	Easy	Tree
408	Valid Word Abbreviation	C++	Easy	String
409	Longest Palindrome	C++	Easy	Hash Table
411	Minimum Unique Word Abbreviation	C++	Hard	Backtracking
412	Fizz Buzz	C++	Easy	Array
416	Partition Equal Subset Sum	C++	Medium	Dynamic Programming
417	Pacific Atlantic Water Flow	C++	Medium	DFS / BFS
418	Sentence Screen Fitting	C++	Medium	Dynamic Programming
433	Minimum Genetic Mutation	C++	Medium	BFS
435	Non-overlapping Intervals	C++	Medium	Greedy
436	Find Right Interval	C++	Medium	Array / Binary Search
438	Find All Anagrams in a String	C++	Easy	Hash Table
441	Arranging Coins	C++	Easy	Math
444	Sequence Reconstruction	C++	Medium	Graph / Topological Sort
450	Delete Node in a BST	C++	Medium	Tree
451	Sort Characters By Frequency	C++	Medium	Hash Table / Heap
461	Hamming Distance	C++	Easy	Bit Manipulation
467	Unique Substrings in Wraparound String	C++	Medium	Dynamic Programming
473	Matchsticks to Square	C++	Medium	DFS
477	Total Hamming Distance	C++	Medium	Bit Manipulation
482	License Key Formatting	C++	Medium	Array
484	Find Permutation	C++	Medium	Greedy
486	Predict the Winner	C++	Medium	Dynamic Programming / Minimax
487	Max Consecutive Ones II	C++	Medium	Two Pointers
489	Robot Room Cleaner	C++	Hard	DFS
490	The Maze	C++	Medium	BFS / DFS
494	Target Sum	C++	Medium	Backtracking
496	Next Greater Element I	C++	Easy	Stack
498	Diagonal Traverse	C++	Medium	Matrix
499	The Maze III	C++	Hard	DFS / BFS
503	Next Greater Element II	C++	Medium	Stack
505	The Maze II	C++	Medium	DFS / BFS
508	Most Frequent Subtree Sum	C++	Medium	Tree / Hash Table
513	Find Bottom Left Tree Value	C++	Medium	Tree / BFS / DFS
515	Find Largest Value in Each Tree Row	C++	Medium	Tree / BFS / DFS
523	Continuous Subarray Sum	C++	Medium	Dynamic Programming
524	Longest Word in Dictionary through Deleting	C++	Medium	Two Pointers
525	Contiguous Array	C++	Medium	Hash Table
531	Lonely Pixel I	C++	Medium	Array / DFS
535	Encode and Decode TinyURL	C++	Medium	String
536	Construct Binary Tree from String	C++	Medium	String / Tree
538	Convert BST to Greater Tree	C++	Easy	DFS
540	Single Element in a Sorted Array	C++	Medium	Array / Binary Search
541	Reverse String II	C++	Easy	String
542	01 Matrix	C++	Medium	BFS / DFS
543	Diameter of Binary Tree	C++	Easy	Tree
547	Friend Circles	C++	Medium	DFS / Union Find
549	Binary Tree Longest Consecutive Sequence II	C++	Medium	Tree
554	Brick Wall	C++	Medium	Hash Table
556	Next Greater Element III	C++	Medium	String
560	Subarray Sum Equals K	C++	Medium	Array / Map
562	Longest Line of Consecutive One in Matrix	C++	Medium	Array
565	Array Nesting	C++	Medium	Array
566	Reshape the Matrix	C++	Easy	Array
567	Permutation in String	C++	Medium	Two Pointers
572	Subtree of Another Tree	C++	Easy	Tree
582	Kill Process	C++	Medium	Tree / BFS / DFS
583	Delete Operation for Two Strings	C++	Medium	Dynamic Programming
599	Minimum Index Sum of Two Lists	C++	Easy	Hash Table
606	Construct String from Binary Tree	C++	Easy	Tree / String
611	Valid Triangle Number	C++	Medium	Array
616	Add Bold Tag in String	C++	Medium	String
621	Task Scheduler	C++	Medium	Array / Queue
632	Smallest Range	C++	Hard	Two Pointers
633	Sum of Square Numbers	C++	Easy	Math
635	Design Log Storage System	C++	Medium	String / Design
636	Exclusive Time of Functions	C++	Medium	Stack
637	Average of Levels in Binary Tree	C++	Easy	BFS
639	Decode Ways II	C++	Hard	Dynamic Programming
642	Design Search Autocomplete System	C++	Hard	Design / Trie
643	Maximum Average Subarray I	C++	Easy	Array
645	Set Mismatch	C++	Easy	Hash Table / Math
647	Palindromic Substrings	C++	Medium	String
648	Replace Words	C++	Medium	Hash Table / Trie
652	Find Duplicate Subtrees	C++	Medium	Tree
653	Two Sum IV - Input is a BST	C++	Easy	DFS
654	Maximum Binary Tree	C++	Medium	Tree
657	Judge Route Circle	C++	Easy	String
658	Find K Closest Elements	C++	Medium	Binary Search
659	Split Array into Consecutive Subsequences	C++	Medium	Greedy
662	Maximum Width of Binary Tree	C++	Medium	Tree / BFS / DFS
663	Equal Tree Partition	C++	Medium	Tree
665	Non-decreasing Array	C++	Easy	Array
669	Trim a Binary Search Tree	C++	Easy	Tree
670	Maximum Swap	C++	Medium	Array / Math
671	Second Minimum Node In a Binary Tree	C++	Easy	Tree
673	Number of Longest Increasing Subsequence	C++	Medium	Dynamic Programming
674	Longest Continuous Increasing Subsequence	C++	Easy	Array
676	Implement Magic Dictionary	C++	Medium	Hash Table / Trie
677	Map Sum Pairs	C++	Medium	Trie
679	24 Game	C++	Hard	DFS
680	Valid Palindrome II	C++	Easy	String
681	Next Closest Time	C++	Medium	String
683	K Empty Slots	C++	Hard	Array / Binary Search
684	Redundant Connection	C++	Medium	Graph / Union Find
685	Redundant Connection II	C++	Hard	Graph / DFS / Union Find
686	Repeated String Match	C++	Easy	String
687	Longest Univalue Path	C++	Easy	Tree / DFS
688	Knight Probability in Chessboard	C++	Medium	Dynamic Programming
689	Maximum Sum of 3 Non-Overlapping Subarrays	C++	Hard	Array / Dynamic Programming
690	Employee Importance	C++	Easy	Hash Table / BFS / DFS
692	Top K Frequent Words	C++	Medium	Hash Table / Heap
693	Binary Number with Alternating Bits	C++	Easy	Bit Manipulation
694	Number of Distinct Islands	C++	Medium	Hash Table / DFS
695	Max Area of Island	C++	Easy	Array / DFS
696	Count Binary Substrings	C++	Easy	String
697	Degree of an Array	C++	Easy	Array
701	Insert into a Binary Search Tree	C++	Medium	Array
713	Subarray Product Less Than K	C++	Medium	Array
717	1-bit and 2-bit Characters	C++	Easy	Array
718	Maximum Length of Repeated Subarray	C++	Medium	Array / Dynamic Programming
720	Longest Word in Dictionary	C++	Easy	Hash Table / Trie
723	Candy Crush	C++	Medium	Array / Two Pointers
724	Find Pivot Index	C++	Easy	Array
725	Split Linked List in Parts	C++	Medium	Linked List
728	Self Dividing Numbers	C++	Easy	Math
729	My Calendar I	C++	Medium	Array
733	Flood Fill	C++	Easy	DFS
734	Sentence Similarity	C++	Easy	Hash Table
735	Asteroid Collision	C++	Medium	Stack
739	Daily Temperatures	C++	Medium	Stack / Hash Table
740	Delete and Earn	C++	Medium	Dynamic Programming
742	Closest Leaf in a Binary Tree	C++	Medium	Tree / Graph
746	Min Cost Climbing Stairs	C++	Easy	Array / Dynamic Programming
747	Largest Number At Least Twice of Others	C++	Easy	Array
750	Number Of Corner Rectangles	C++	Medium	Dynamic Programming
753	Cracking the Safe	C++	Hard	DFS
758	Bold Words in String	C++	Easy	String
760	Find Anagram Mappings	C++	Easy	Hash Table
763	Partition Labels	C++	Medium	Two Pointers / Greedy
765	Couples Holding Hands	C++	Hard	Greedy / Union Find / Greedy
766	Toeplitz Matrix	C++	Easy	Array
769	Max Chunks To Make Sorted	C++	Medium	Array
771	Jewels and Stones	C++	Easy	Hash Table
773	Sliding Puzzle	C++	Hard	BFS
777	Swap Adjacent in LR String	C++	Medium	Brainteaser
779	K-th Symbol in Grammar	C++	Medium	Recursion
783	Minimum Distance Between BST Nodes	C++	Easy	Tree
784	Letter Case Permutation	C++	Easy	String
785	Is Graph Bipartite	C++	Medium	Graph
787	Cheapest Flights Within K Stops	C++	Medium	Graph / Heap
791	Custom Sort String	C++	Medium	String
792	Number of Matching Subsequences	C++	Medium	Array
797	All Paths From Source to Target	C++	Medium	DFS / Graph
798	Smallest Rotation with Highest Score	C++	Hard	Array
799	Champagne Tower	C++	Medium	Array
802	Find Eventual Safe States	C++	Medium	DFS / Graph
803	Bricks Falling When Hit	C++	Hard	Union Find
804	Unique Morse Code Words	C++	Easy	String
805	Split Array With Same Average	C++	Hard	Math
806	Number of Lines To Write String	C++	Easy	String
807	Max Increase to Keep City Skyline	C++	Medium	Array
809	Expressive Words	C++	Medium	String
814	Binary Tree Pruning	C++	Medium	Tree
815	Bus Routes	C++	Hard	BFS
819	Most Common Word	C++	Easy	String
820	Short Encoding of Words	C++	Medium	Trie
821	Shortest Distance to a Character	C++	Easy	String
826	Most Profit Assigning Work	C++	Medium	Two Pointers / Binary Search
830	Positions of Large Groups	C++	Easy	Array
832	Flipping an Image	C++	Easy	Array
834	Sum of Distances in Tree	C++	Hard	Tree / DFS
836	Rectangle Overlap	C++	Easy	Math
841	Keys and Rooms	C++	Medium	DFS / BFS / Graph
843	Guess the Word	C++	Hard	Minimax
844	Backspace String Compare	C++	Easy	Stack / Two Pointers
845	Longest Mountain in Array	C++	Medium	Two Pointers
846	Hand of Straights	C++	Medium	Map
848	Shifting Letters	C++	Medium	String
849	Maximize Distance to Closest Person	C++	Easy	Array
852	Peak Index in a Mountain Array	C++	Easy	Binary Search
853	Car Fleet	C++	Medium	Stack
855	Exam Room	C++	Medium	Map
857	Minimum Cost to Hire K Workers	C++	Hard	Heap
859	Buddy Strings	C++	Easy	String
872	Leaf-Similar Trees	C++	Easy	Tree / DFS
876	Middle of the Linked List	C++	Easy	Linked List
884	Uncommon Words from Two Sentences	C++	Easy	Hash Table
888	Fair Candy Swap	C++	Easy	Array
889	Construct Binary Tree from Preorder and Postorder Traversal	C++	Medium	Tree
890	Find and Replace Pattern	C++	Medium	String
894	All Possible Full Binary Trees	C++	Medium	Tree / Recursion
896	Monotonic Array	C++	Easy	Array
900	RLE Iterator	C++	Medium	Array
904	Fruit Into Baskets	C++	Medium	Two Pointers
911	Online Election	C++	Medium	Binary Search / Map
914	X of a Kind in a Deck of Cards	C++	Easy	Array / Math
916	Word Subsets	C++	Medium	String
925	Long Pressed Name	C++	Easy	String
929	Unique Email Addresses	C++	Easy	String
932	Beautiful Array	C++	Medium	Divide and Conquer
933	Number of Recent Calls	C++	Easy	Queue
935	Knight Dialer	C++	Medium	Dynamic Programming
938	Range Sum of BST	C++	Medium	Tree
939	Minimum Area Rectangle	C++	Medium	Hash Table
941	Valid Mountain Array	C++	Easy	Array
946	Validate Stack Sequences	C++	Medium	Stack
951	Flip Equivalent Binary Trees	C++	Medium	Tree

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Leetcode Python Solution. Those who Want to learn Python From Scratch check out the Website linked below. Good Luck.

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