Leetcode Solutions

#	Title	Solution	Runtime
1	Two Sum	Java	1 ms
2	Add Two Numbers	C++	36 ms
3	Longest Substring Without Repeating Characters	C++	60 ms
4	Median of Two Sorted Arrays	Java	2 ms
5	Longest Palindromic Substring	Java	387 ms
6	ZigZag Conversion	Python3	64 ms
7	Reverse Integer	C++	0 ms
9	Palindrome Number	Java	21 ms
11	Container With Most Water	Java	3 ms
13	Roman to Integer	C++	4 ms
14	Longest Common Prefix	Java	1 ms
15	3Sum	Java	28 ms
17	Letter Combinations of a Phone Number	C++	0 ms
19	Remove Nth Node From End of List	Java	0 ms
20	Valid Parentheses	C++	0 ms
21	Merge Two Sorted Lists	Java	0 ms
22	Generate Parentheses	Java	1 ms
23	Merge k Sorted Lists	Java	4 ms
24	Swap Nodes in Pairs	C++	0 ms
25	Reverse Nodes in k-Group	Java	1 ms
26	Remove Duplicates from Sorted Array	Java	2 ms
28	Find the Index of the First Occurrence in a String	Java	0 ms
31	Next Permutation	C++	4 ms
33	Search in Rotated Sorted Array	C++	4 ms
34	Find First and Last Position of Element in Sorted Array	C++	8 ms
36	Valid Sudoku	Java	30 ms
38	Count and Say	C#	88 ms
40	Combination Sum II	Java	2 ms
45	Jump Game II	Java	0 ms
46	Permutations	Java	1 ms
49	Group Anagrams	Java	17 ms
50	Pow(x, n)	C++	4 ms
51	N-Queens	Java	3 ms
52	N-Queens II	Java	0 ms
53	Maximum Subarray	Java	1 ms
54	Spiral Matrix	C++	0 ms
55	Jump Game	Java	1 ms
62	Unique Paths	Java	23 ms
64	Minimum Path Sum	C++	20 ms
65	Valid Number	Java	2 ms
66	Plus One	C++	0 ms
69	Sqrt(x)	Python3	48 ms
70	Climbing Stairs	C++	0 ms
72	Edit Distance	Java	5 ms
73	Set Matrix Zeroes	Java	0 ms
74	Search a 2D Matrix	Java	0 ms
75	Sort Colors	Java	0 ms
76	Minimum Window Substring	Java	12 ms
77	Combinations	C++	1376 ms
78	Subsets	C++	4 ms
79	Word Search	Java	200 ms
80	Remove Duplicates from Sorted Array II	C++	8 ms
81	Search in Rotated Sorted Array II	Java	0 ms
82	Remove Duplicates from Sorted List II	Java	0 ms
83	Remove Duplicates from Sorted List	Java	0 ms
84	Largest Rectangle in Histogram	Java	52 ms
88	Merge Sorted Array	C++	4 ms
90	Subsets II	Java	3 ms
91	Decode Ways	Java	43 ms
94	Binary Tree Inorder Traversal	Java	0 ms
98	Validate Binary Search Tree	Java	0 ms
100	Same Tree	Java	0 ms
101	Symmetric Tree	C++	4 ms
102	Binary Tree Level Order Traversal	JavaScript	84 ms
103	Binary Tree Zigzag Level Order Traversal	JavaScript	84 ms
104	Maximum Depth of Binary Tree	C++	4 ms
105	Construct Binary Tree from Preorder and Inorder Traversal	Java	2 ms
106	Construct Binary Tree from Inorder and Postorder Traversal	Java	4 ms
107	Binary Tree Level Order Traversal II	JavaScript	88 ms
108	Convert Sorted Array to Binary Search Tree	C++	20 ms
109	Convert Sorted List to Binary Search Tree	Java	0 ms
110	Balanced Binary Tree	JavaScript	88 ms
114	Flatten Binary Tree to Linked List	Python3	0 ms
118	Pascal's Triangle	C++	0 ms
121	Best Time to Buy and Sell Stock	C++	12 ms
122	Best Time to Buy and Sell Stock II	Java	2 ms
123	Best Time to Buy and Sell Stock III	Java	3 ms
124	Binary Tree Maximum Path Sum	Java	1 ms
125	Valid Palindrome	Python3	1228 ms
130	Surrounded Regions	Java	5 ms
131	Palindrome Partitioning	Java	8 ms
133	Clone Graph	Java	25 ms
134	Gas Station	Java	4 ms
136	Single Number	C++	32 ms
137	Single Number II	C++	16 ms
138	Copy List with Random Pointer	Java	0 ms
140	Word Break II	Java	9 ms
141	Linked List Cycle	C++	32 ms
142	Linked List Cycle II	Java	0 ms
143	Reorder List	Java	1 ms
144	Binary Tree Preorder Traversal	Java	0 ms
145	Binary Tree Postorder Traversal	Java	0 ms
146	LRU Cache	Java	14 ms
148	Sort List	Java	6 ms
150	Evaluate Reverse Polish Notation	Java	7 ms
152	Maximum Product Subarray	Java	1 ms
153	Find Minimum in Rotated Sorted Array	Java	0 ms
155	Min Stack	C++	36 ms
160	Intersection of Two Linked Lists	Java	1 ms
162	Find Peak Element	Java	0 ms
164	Maximum Gap	Java	2 ms
169	Majority Element	C++	56 ms
171	Excel Sheet Column Number	C++	4 ms
172	Factorial Trailing Zeroes	Python3	32 ms
173	Binary Search Tree Iterator	C++	36 ms
179	Largest Number	C++	44 ms
188	Best Time to Buy and Sell Stock IV	Java	10 ms
189	Rotate Array	C++	12 ms
190	Reverse Bits	C++	0 ms
191	Number of 1 Bits	C++	4 ms
198	House Robber	Java	4 ms
200	Number of Islands	Java	3 ms
202	Happy Number	C++	4 ms
204	Count Primes	Java	33 ms
205	Isomorphic Strings	Java	6 ms
206	Reverse Linked List	Java	0 ms
207	Course Schedule	Java	6 ms
208	Implement Trie (Prefix Tree)	Java	38 ms
209	Minimum Size Subarray Sum	Java	1 ms
210	Course Schedule II	Java	8 ms
211	Design Add and Search Words Data Structure	Java	786 ms
213	House Robber II	Java	6 ms
215	Kth Largest Element in an Array	Java	35 ms
217	Contains Duplicate	C++	108 ms
219	Contains Duplicate II	Java	18 ms
224	Basic Calculator	Python3	101 ms
226	Invert Binary Tree	Java	0 ms
227	Basic Calculator II	C++	20 ms
229	Majority Element II	Java	1 ms
230	Kth Smallest Element in a BST	Java	0 ms
232	Implement Queue using Stacks	Java	0 ms
234	Palindrome Linked List	Java	15 ms
235	Lowest Common Ancestor of a Binary Search Tree	Java	4 ms
237	Delete Node in a Linked List	C++	16 ms
238	Product of Array Except Self	Java	11 ms
239	Sliding Window Maximum	Java	N/A
240	Search a 2D Matrix II	Java	4 ms
242	Valid Anagram	C++	64 ms
268	Missing Number	Java	0 ms
279	Perfect Squares	Java	55 ms
283	Move Zeroes	C++	8 ms
290	Word Pattern	Python3	36 ms
295	Find Median from Data Stream	Java	107 ms
300	Longest Increasing Subsequence	Java	65 ms
303	Range Sum Query - Immutable	Java	9 ms
304	Range Sum Query 2D - Immutable	Java	19 ms
309	Best Time to Buy and Sell Stock with Cooldown	Java	0 ms
310	Minimum Height Trees	Java	62 ms
315	Count of Smaller Numbers After Self	Java	20 ms
318	Maximum Product of Word Lengths	Java	251 ms
322	Coin Change	Java	10 ms
324	Wiggle Sort II	Java	2 ms
326	Power of Three	C++	92 ms
328	Odd Even Linked List	Java	1 ms
332	Reconstruct Itinerary	Java	N/A
336	Palindrome Pairs	Java	64 ms
344	Reverse String	C++	32 ms
345	Reverse Vowels of a String	Java	18 ms
347	Top K Frequent Elements	Java	20 ms
350	Intersection of Two Arrays II	C++	8 ms
352	Data Stream as Disjoint Intervals	Java	273 ms
354	Russian Doll Envelopes	Java	203 ms
380	Insert Delete GetRandom O(1)	Java	130 ms
382	Linked List Random Node	Java	18 ms
384	Shuffle an Array	Java	75 ms
387	First Unique Character in a String	C++	148 ms
392	Is Subsequence	Java	0 ms
395	Longest Substring with At Least K Repeating Characters	C++	0 ms
412	Fizz Buzz	C++	4 ms
415	Add Strings	Java	4 ms
416	Partition Equal Subset Sum	C++	780 ms
419	Battleships in a Board	C++	12 ms
429	N-ary Tree Level Order Traversal	Java	4 ms
433	Minimum Genetic Mutation	Java	7 ms
435	Non-overlapping Intervals	Java	86 ms
438	Find All Anagrams in a String	Java	60 ms
450	Delete Node in a BST	Java	0 ms
451	Sort Characters By Frequency	Java	61 ms
452	Minimum Number of Arrows to Burst Balloons	Java	124 ms
460	LFU Cache	Java	65 ms
472	Concatenated Words	Java	75 ms
473	Matchsticks to Square	Java	970 ms
485	Max Consecutive Ones	Java	2 ms
491	Non-decreasing Subsequences	Java	13 ms
496	Next Greater Element I	Java	3 ms
518	Coin Change 2	Java	3 ms
520	Detect Capital	Java	1 ms
523	Continuous Subarray Sum	Java	68 ms
525	Contiguous Array	Java	19 ms
540	Single Element in a Sorted Array	Java	0 ms
542	01 Matrix	Java	13 ms
543	Diameter of Binary Tree	Java	0 ms
547	Number of Provinces	Java	3 ms
556	Next Greater Element III	Java	9 ms
560	Subarray Sum Equals K	Java	19 ms
561	Array Partition I	Java	17 ms
563	Binary Tree Tilt	Java	1 ms
572	Subtree of Another Tree	Java	3 ms
576	Out of Boundary Paths	Java	5 ms
583	Delete Operation for Two Strings	Java	320 ms
605	Can Place Flowers	Java	2 ms
609	Find Duplicate File in System	Java	13 ms
611	Valid Triangle Number	Java	32 ms
621	Task Scheduler	C++	344 ms
622	Design Circular Queue	Java	10 ms
623	Add One Row to Tree	Java	1 ms
628	Maximum Product of Three Numbers	Java	4 ms
630	Course Schedule III	Java	N/A
637	Average of Levels in Binary Tree	Java	4 ms
643	Maximum Average Subarray I	Java	5 ms
645	Set Mismatch	Java	33 ms
647	Palindromic Substrings	Java	13 ms
665	Non-decreasing Array	Java	0 ms
669	Trim a Binary Search Tree	C++	12 ms
670	Maximum Swap	Java	8 ms
684	Redundant Connection	Java	0 ms
692	Top K Frequent Words	Java	18 ms
695	Max Area of Island	Java	10 ms
700	Search in a Binary Search Tree	JavaScript	100 ms
704	Binary Search	Java	0 ms
709	To Lower Case	Java	0 ms
718	Maximum Length of Repeated Subarray	Java	51 ms
724	Find Pivot Index	Java	1 ms
729	My Calendar I	Java	20 ms
739	Daily Temperatures	Java	241 ms
745	Prefix and Suffix Search	Java	188 ms
746	Min Cost Climbing Stairs	Java	3 ms
752	Open the Lock	Java	28 ms
754	Reach a Number	C++	0 ms
766	Toeplitz Matrix	Java	1 ms
783	Minimum Distance Between BST Nodes	Java	0 ms
787	Cheapest Flights Within K Stops	Java	4 ms
792	Number of Matching Subsequences	Java	1867 ms
795	Number of Subarrays with Bounded Maximum	Java	5 ms
797	All Paths From Source to Target	Java	3 ms
815	Bus Routes	Java	84 ms
816	Ambiguous Coordinates	Java	11 ms
835	Image Overlap	Java	99 ms
838	Push Dominoes	Java	28 ms
839	Similar String Groups	Java	167 ms
841	Keys and Rooms	Java	3 ms
849	Maximize Distance to Closest Person	Java	2 ms
863	All Nodes Distance K in Binary Tree	Java	12 ms
865	Smallest Subtree with all the Deepest Nodes	Java	0 ms
871	Minimum Number of Refueling Stops	Java	N/A
872	Leaf-Similar Trees	Java	9 ms
875	Koko Eating Bananas	Java	29 ms
876	Middle of the Linked List	Java	0 ms
880	Decoded String at Index	Java	7 ms
886	Possible Bipartition	Java	91 ms
889	Construct Binary Tree from Preorder and Postorder Traversal	Java	0 ms
890	Find and Replace Pattern	Java	3 ms
897	Increasing Order Search Tree	C++	4 ms
904	Fruit Into Baskets	C++	256 ms
905	Sort Array By Parity	Java	1 ms
906	Super Palindromes	Java	809 ms
907	Sum of Subarray Minimums	Java	78 ms
911	Online Election	C++	344 ms
912	Sort an Array	Java	21 ms
915	Partition Array into Disjoint Intervals	Java	1 ms
918	Maximum Sum Circular Subarray	Java	4 ms
921	Minimum Add to Make Parentheses Valid	Java	0 ms
925	Long Pressed Name	Java	1 ms
929	Unique Email Addresses	Java	13 ms
931	Minimum Falling Path Sum	Java	12 ms
934	Shortest Bridge	Java	6 ms
938	Range Sum of BST	Java	0 ms
941	Valid Mountain Array	C++	104 ms
943	Find the Shortest Superstring	Java	26 ms
946	Validate Stack Sequences	Java	1 ms
952	Largest Component Size by Common Factor	Java	405 ms
967	Numbers With Same Consecutive Differences	Java	9 ms
968	Binary Tree Cameras	Java	2 ms
974	Subarray Sums Divisible by K	Java	4 ms
976	Largest Perimeter Triangle	Java	15 ms
977	Squares of a Sorted Array	C++	52 ms
981	Time Based Key-Value Store	Java	414 ms
987	Vertical Order Traversal of a Binary Tree	Java	8 ms
990	Satisfiability of Equality Equations	Java	14 ms
994	Rotting Oranges	Java	19 ms
1008	Construct Binary Search Tree from Preorder Traversal	Java	0 ms
1015	Smallest Integer Divisible by K	C++	0 ms
1020	Number of Enclaves	Java	12 ms
1026	Maximum Difference Between Node and Ancestor	Java	1 ms
1048	Longest String Chain	Java	116 ms
1051	Height Checker	Java	1 ms
1061	Lexicographically Smallest Equivalent String	Java	25 ms
1094	Car Pooling	Java	16 ms
1110	Delete Nodes And Return Forest	Java	1 ms
1122	Relative Sort Array	Java	3 ms
1123	Lowest Common Ancestor of Deepest Leaves	C++	24 ms
1137	N-th Tribonacci Number	Java	0 ms
1143	Longest Common Subsequence	Java	14 ms
1155	Number of Dice Rolls With Target Sum	Java	86 ms
1162	As Far from Land as Possible	Java	11 ms
1192	Critical Connections in a Network	Java	134 ms
1235	Maximum Profit in Job Scheduling	Java	98 ms
1239	Maximum Length of a Concatenated String with Unique Characters	Java	55 ms
1268	Search Suggestions System	Java	8 ms
1293	Shortest Path in a Grid with Obstacles Elimination	Java	37 ms
1302	Deepest Leaves Sum	Java	2 ms
1306	Jump Game III	Java	8 ms
1329	Sort the Matrix Diagonally	C++	8 ms
1339	Maximum Product of Splitted Binary Tree	Java	10 ms
1354	Construct Target Array With Multiple Sums	Java	N/A
1383	Maximum Performance of a Team	Java	49 ms
1423	Maximum Points You Can Obtain from Cards	Java	1 ms
1443	Minimum Time to Collect All Apples in a Tree	Java	43 ms
1448	Count Good Nodes in Binary Tree	Java	4 ms
1457	Pseudo-Palindromic Paths in a Binary Tree	C++	204 ms
1465	Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts	Java	22 ms
1472	Design Browser History	Java	58 ms
1480	Running Sum of 1d Array	Java	0 ms
1498	Number of Subsequences That Satisfy the Given Sum Condition	Java	41 ms
1584	Min Cost to Connect All Points	Java	440 ms
1626	Best Team With No Conflicts	Java	252 ms
1639	Number of Ways to Form a Target String Given a Dictionary	Java	107 ms
1641	Count Sorted Vowel Strings	C++	720 ms
1646	Get Maximum in Generated Array	C++	0 ms
1657	Determine if Two Strings Are Close	Java	81 ms
1658	Minimum Operations to Reduce X to Zero	C++	148 ms
1662	Check If Two String Arrays are Equivalent	Java	1 ms
1679	Max Number of K-Sum Pairs	C++	156 ms
1680	Concatenation of Consecutive Binary Numbers	Python3	3696 ms
1689	Partitioning Into Minimum Number Of Deci-Binary Numbers	Java	5 ms
1695	Maximum Erasure Value	Java	53 ms
1696	Jump Game VI	Java	85 ms
1704	Determine if String Halves Are Alike	Java	7 ms
1706	Where Will the Ball Fall	Java	1 ms
1710	Maximum Units on a Truck	Java	122 ms
1832	Check if the Sentence Is Pangram	Java	10 ms
1833	Maximum Ice Cream Bars	Java	57 ms
1834	Single-Threaded CPU	Java	115 ms
1901	Find a Peak Element II	Java	1 ms
1910	Remove All Occurrences of a Substring	Python	24 ms
1921	Eliminate Maximum Number of Monsters	Java	26 ms
1926	Nearest Exit from Entrance in Maze	Java	8 ms
1962	Remove Stones to Minimize the Total	Java	500 ms
1971	Find if Path Exists in Graph	Java	27 ms
1996	The Number of Weak Characters in the Game	Java	216 ms
2007	Find Original Array From Doubled Array	Java	231 ms
2095	Delete the Middle Node of a Linked List	Java	6 ms
2136	Earliest Possible Day of Full Bloom	Java	187 ms
2225	Find Players With Zero or One Losses	Java	645 ms
2244	Minimum Rounds to Complete All Tasks	Java	122 ms
2299	Strong Password Checker II	Java	3 ms
2300	Successful Pairs of Spells and Potions	Java	87 ms
2301	Match Substring After Replacement	Java	229 ms
2341	Maximum Number of Pairs in Array	Java	2 ms
2389	Longest Subsequence With Limited Sum	Java	11 ms
2466	Count Ways To Build Good Strings	Java	50 ms
NaN	Number of Ways to Stay in the Same Place After Some Steps	Java	507 ms
NaN	Number of Ways to Stay in the Same Place After Some Steps	Java	507 ms
NaN	Design Twitter	Java	10 ms
NaN	Number of Great Partitions	Java	717 ms
NaN	Delete and Earn	Java	8 ms
NaN	Swap Nodes in Pairs	Java	0 ms
NaN	Maximum Frequency Stack	Java	34 ms
NaN	Find Largest Value in Each Tree Row	Java	9 ms
2616	Minimize the Maximum Difference of Pairs	Java	18 ms