LeetCode Solutions

NOTE: The content of this Readme file alongside with solution files were autogenerated by generate_all_files.py script.

Solved Questions: 244/1413 - 17.27%

Easy: 148/244 - 60.66%

Medium: 86/244 - 35.25%

Hard: 10/244 - 4.1%

#	Title	Solution	Difficulty
1	Two Sum	Python3	Easy
2	Add Two Numbers	Python3	Medium
3	Longest Substring Without Repeating Characters	Python3	Medium
4	Median of Two Sorted Arrays	Python3	Hard
15	3Sum	Python3	Medium
20	Valid Parentheses	Python3	Easy
21	Merge Two Sorted Lists	Python3	Easy
26	Remove Duplicates from Sorted Array	Python3	Easy
27	Remove Element	Python3	Easy
28	Implement strStr()	Python3	Easy
33	Search in Rotated Sorted Array	Python3	Medium
35	Search Insert Position	Python3	Easy
36	Valid Sudoku	Python3	Medium
49	Group Anagrams	Python3	Medium
50	Pow(x, n)	Python3	Medium
53	Maximum Subarray	Python3	Easy
55	Jump Game	Python3	Medium
60	Permutation Sequence	Python3	Hard
62	Unique Paths	Python3	Medium
64	Minimum Path Sum	Python3	Medium
65	Valid Number	Python3	Hard
66	Plus One	Python3	Easy
67	Add Binary	Python3	Easy
69	Sqrt(x)	Python3	Easy
70	Climbing Stairs	Python3	Easy
72	Edit Distance	Python3	Hard
75	Sort Colors	Python3	Medium
76	Minimum Window Substring	Python3	Hard
78	Subsets	Python3	Medium
79	Word Search	Python3	Medium
83	Remove Duplicates from Sorted List	Python3	Easy
88	Merge Sorted Array	Python3	Easy
96	Unique Binary Search Trees	Python3	Medium
98	Validate Binary Search Tree	Python3	Medium
100	Same Tree	Python3	Easy
102	Binary Tree Level Order Traversal	Python3	Medium
103	Binary Tree Zigzag Level Order Traversal	Python3	Medium
104	Maximum Depth of Binary Tree	Python3	Easy
107	Binary Tree Level Order Traversal II	Python3	Easy
119	Pascal's Triangle II	Python3	Easy
121	Best Time to Buy and Sell Stock	Python3	Easy
122	Best Time to Buy and Sell Stock II	Python3	Easy
124	Binary Tree Maximum Path Sum	Python3	Hard
125	Valid Palindrome	Python3	Easy
129	Sum Root to Leaf Numbers	Python3	Medium
130	Surrounded Regions	Python3	Medium
134	Gas Station	Python3	Medium
136	Single Number	Python3	Easy
137	Single Number II	Python3	Medium
138	Copy List with Random Pointer	Python3	Medium
141	Linked List Cycle	Python3	Easy
146	LRU Cache	Python3	Medium
151	Reverse Words in a String	Python3	Medium
153	Find Minimum in Rotated Sorted Array	Python3	Medium
155	Min Stack	Python3	Easy
160	Intersection of Two Linked Lists	Python3	Easy
167	Two Sum II - Input array is sorted	Python3	Easy
169	Majority Element	Python3	Easy
171	Excel Sheet Column Number	Python3	Easy
174	Dungeon Game	Python3	Hard
190	Reverse Bits	Python3	Easy
200	Number of Islands	Python3	Medium
201	Bitwise AND of Numbers Range	Python3	Medium
202	Happy Number	Python3	Easy
203	Remove Linked List Elements	Python3	Easy
205	Isomorphic Strings	Python3	Easy
206	Reverse Linked List	Python3	Easy
207	Course Schedule	Python3	Medium
208	Implement Trie (Prefix Tree)	Python3	Medium
210	Course Schedule II	Python3	Medium
211	Design Add and Search Words Data Structure	Python3	Medium
212	Word Search II	Python3	Hard
215	Kth Largest Element in an Array	Python3	Medium
217	Contains Duplicate	Python3	Easy
219	Contains Duplicate II	Python3	Easy
221	Maximal Square	Python3	Medium
222	Count Complete Tree Nodes	Python3	Medium
226	Invert Binary Tree	Python3	Easy
230	Kth Smallest Element in a BST	Python3	Medium
231	Power of Two	Python3	Easy
232	Implement Queue using Stacks	Python3	Easy
234	Palindrome Linked List	Python3	Easy
237	Delete Node in a Linked List	Python3	Easy
238	Product of Array Except Self	Python3	Medium
239	Sliding Window Maximum	Python3	Hard
242	Valid Anagram	Python3	Easy
257	Binary Tree Paths	Python3	Easy
258	Add Digits	Python3	Easy
260	Single Number III	Python3	Medium
264	Ugly Number II	Python3	Medium
273	Integer to English Words	Python3	Hard
274	H-Index	Python3	Medium
275	H-Index II	Python3	Medium
278	First Bad Version	Python3	Easy
279	Perfect Squares	Python3	Medium
283	Move Zeroes	Python3	Easy
292	Nim Game	Python3	Easy
299	Bulls and Cows	Python3	Easy
303	Range Sum Query - Immutable	Python3	Easy
322	Coin Change	Python3	Medium
328	Odd Even Linked List	Python3	Medium
332	Reconstruct Itinerary	Python3	Medium
338	Counting Bits	Python3	Medium
342	Power of Four	Python3	Easy
344	Reverse String	Python3	Easy
345	Reverse Vowels of a String	Python3	Easy
347	Top K Frequent Elements	Python3	Medium
349	Intersection of Two Arrays	Python3	Easy
350	Intersection of Two Arrays II	Python3	Easy
355	Design Twitter	Python3	Medium
367	Valid Perfect Square	Python3	Easy
368	Largest Divisible Subset	Python3	Medium
374	Guess Number Higher or Lower	Python3	Easy
380	Insert Delete GetRandom O(1)	Python3	Medium
383	Ransom Note	Python3	Easy
387	First Unique Character in a String	Python3	Easy
392	Is Subsequence	Python3	Easy
402	Remove K Digits	Python3	Medium
406	Queue Reconstruction by Height	Python3	Medium
409	Longest Palindrome	Python3	Easy
414	Third Maximum Number	Python3	Easy
430	Flatten a Multilevel Doubly Linked List	Python3	Medium
438	Find All Anagrams in a String	Python3	Medium
441	Arranging Coins	Python3	Easy
442	Find All Duplicates in an Array	Python3	Medium
448	Find All Numbers Disappeared in an Array	Python3	Easy
451	Sort Characters By Frequency	Python3	Medium
461	Hamming Distance	Python3	Easy
463	Island Perimeter	Python3	Easy
468	Validate IP Address	Python3	Medium
476	Number Complement	Python3	Easy
485	Max Consecutive Ones	Python3	Easy
496	Next Greater Element I	Python3	Easy
501	Find Mode in Binary Search Tree	Python3	Easy
509	Fibonacci Number	Python3	Easy
518	Coin Change 2	Python3	Medium
520	Detect Capital	Python3	Easy
525	Contiguous Array	Python3	Medium
528	Random Pick with Weight	Python3	Medium
540	Single Element in a Sorted Array	Python3	Medium
543	Diameter of Binary Tree	Python3	Easy
557	Reverse Words in a String III	Python3	Easy
559	Maximum Depth of N-ary Tree	Python3	Easy
560	Subarray Sum Equals K	Python3	Medium
561	Array Partition I	Python3	Easy
567	Permutation in String	Python3	Medium
575	Distribute Candies	Python3	Easy
599	Minimum Index Sum of Two Lists	Python3	Easy
657	Robot Return to Origin	Python3	Easy
662	Maximum Width of Binary Tree	Python3	Medium
678	Valid Parenthesis String	Python3	Medium
680	Valid Palindrome II	Python3	Easy
682	Baseball Game	Python3	Easy
692	Top K Frequent Words	Python3	Medium
700	Search in a Binary Search Tree	Python3	Easy
703	Kth Largest Element in a Stream	Python3	Easy
704	Binary Search	Python3	Easy
705	Design HashSet	Python3	Easy
706	Design HashMap	Python3	Easy
709	To Lower Case	Python3	Easy
717	1-bit and 2-bit Characters	Python3	Easy
728	Self Dividing Numbers	Python3	Easy
733	Flood Fill	Python3	Easy
744	Find Smallest Letter Greater Than Target	Python3	Easy
746	Min Cost Climbing Stairs	Python3	Easy
771	Jewels and Stones	Python3	Easy
784	Letter Case Permutation	Python3	Medium
787	Cheapest Flights Within K Stops	Python3	Medium
796	Rotate String	Python3	Easy
797	All Paths From Source to Target	Python3	Medium
804	Unique Morse Code Words	Python3	Easy
819	Most Common Word	Python3	Easy
844	Backspace String Compare	Python3	Easy
852	Peak Index in a Mountain Array	Python3	Easy
860	Lemonade Change	Python3	Easy
876	Middle of the Linked List	Python3	Easy
883	Projection Area of 3D Shapes	Python3	Easy
886	Possible Bipartition	Python3	Medium
893	Groups of Special-Equivalent Strings	Python3	Easy
896	Monotonic Array	Python3	Easy
901	Online Stock Span	Python3	Medium
905	Sort Array By Parity	Python3	Easy
908	Smallest Range I	Python3	Easy
918	Maximum Sum Circular Subarray	Python3	Medium
922	Sort Array By Parity II	Python3	Easy
929	Unique Email Addresses	Python3	Easy
941	Valid Mountain Array	Python3	Easy
957	Prison Cells After N Days	Python3	Medium
973	K Closest Points to Origin	Python3	Medium
976	Largest Perimeter Triangle	Python3	Easy
977	Squares of a Sorted Array	Python3	Easy
986	Interval List Intersections	Python3	Medium
987	Vertical Order Traversal of a Binary Tree	Python3	Medium
989	Add to Array-Form of Integer	Python3	Easy
993	Cousins in Binary Tree	Python3	Easy
994	Rotting Oranges	Python3	Medium
997	Find the Town Judge	Python3	Easy
1008	Construct Binary Search Tree from Preorder Traversal	Python3	Medium
1009	Complement of Base 10 Integer	Python3	Easy
1021	Remove Outermost Parentheses	Python3	Easy
1025	Divisor Game	Python3	Easy
1029	Two City Scheduling	Python3	Easy
1030	Matrix Cells in Distance Order	Python3	Easy
1046	Last Stone Weight	Python3	Easy
1047	Remove All Adjacent Duplicates In String	Python3	Easy
1051	Height Checker	Python3	Easy
1089	Duplicate Zeros	Python3	Easy
1103	Distribute Candies to People	Python3	Easy
1108	Defanging an IP Address	Python3	Easy
1137	N-th Tribonacci Number	Python3	Easy
1143	Longest Common Subsequence	Python3	Medium
1200	Minimum Absolute Difference	Python3	Easy
1217	Play with Chips	Python3	Easy
1221	Split a String in Balanced Strings	Python3	Easy
1232	Check If It Is a Straight Line	Python3	Easy
1237	Find Positive Integer Solution for a Given Equation	Python3	Easy
1277	Count Square Submatrices with All Ones	Python3	Medium
1281	Subtract the Product and Sum of Digits of an Integer	Python3	Easy
1286	Iterator for Combination	Python3	Medium
1290	Convert Binary Number in a Linked List to Integer	Python3	Easy
1295	Find Numbers with Even Number of Digits	Python3	Easy
1299	Replace Elements with Greatest Element on Right Side	Python3	Easy
1309	Decrypt String from Alphabet to Integer Mapping	Python3	Easy
1313	Decompress Run-Length Encoded List	Python3	Easy
1323	Maximum 69 Number	Python3	Easy
1333	Filter Restaurants by Vegan-Friendly, Price and Distance	Python3	Medium
1344	Angle Between Hands of a Clock	Python3	Medium
1346	Check If N and Its Double Exist	Python3	Easy
1351	Count Negative Numbers in a Sorted Matrix	Python3	Easy
1356	Sort Integers by The Number of 1 Bits	Python3	Easy
1370	Increasing Decreasing String	Python3	Easy
1374	Generate a String With Characters That Have Odd Counts	Python3	Easy
1381	Design a Stack With Increment Operation	Python3	Medium
1389	Create Target Array in the Given Order	Python3	Easy
1403	Minimum Subsequence in Non-Increasing Order	Python3	Easy
1426	Counting Elements	Python3	Easy
1427	Perform String Shifts	Python3	Easy
1428	Leftmost Column with at Least a One	Python3	Medium
1429	First Unique Number	Python3	Medium
1430	Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	Python3	Medium
1436	Destination City	Python3	Easy
1441	Build an Array With Stack Operations	Python3	Easy
1470	Shuffle the Array	Python3	Easy
1480	Running Sum of 1d Array	Python3	Easy