README.md

DSA

NeetCode150 list: https://neetcode.io/practice

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Coding_Main

SR Score	Problem	Last Reviewed	Time	Score	DS	Algo	Stated	Perceived	Frequency	Company	Confident	Repeat Offender	Needs Review	Link	C_Date	C_Time	C_Solution	List
945762	121. Best Time to Buy and Sell Stock	@October 16, 2022	45		arrays	kadanesliding window	easy	medium						https://leetcode.com/problems/best-time-to-buy-and-sell-stock/	139627	18000	6	REPEAT
919842	684. Redundant Connection	@October 19, 2022	45		graphs	dfsunion find	medium	medium						https://leetcode.com/problems/redundant-connection/description/	135307	18000	6	REPEAT
884376	125. Valid Palindrome	@October 12, 2022	20.09		arrays	running pointers	easy	easy						https://leetcode.com/problems/valid-palindrome/	145387	2009	6	DONE
868650	102. Binary Tree Level Order Traversal	@October 13, 2022	8.28		trees	bfs	medium	easy						https://leetcode.com/problems/binary-tree-level-order-traversal/	143947	828	6	DONE
866670	739. Daily Temperatures	@October 21, 2022	40.06		stacks		medium	medium						https://leetcode.com/problems/daily-temperatures/description/	132427	12018	6	REPEATED
866160	100. Same Tree	@October 13, 2022	4.13		trees	dfsrecursion	easy	easy						https://leetcode.com/problems/same-tree/	143947	413	6	DONE
864510	226. Invert Binary Tree	@October 13, 2022	1.38		trees	dfsrecursion	easy	easy						https://leetcode.com/problems/invert-binary-tree/	143947	138	6	DONE
857844	238. Product of Array Except Self	@October 15, 2022	19.07		arrays	prefix sum	medium	medium						https://leetcode.com/problems/product-of-array-except-self/	141067	1907	6	REPEAT
853170	347. Top K Frequent Elements	@October 15, 2022	11.28		arrays	hashmap	medium	easy						https://leetcode.com/problems/top-k-frequent-elements/description/	141067	1128	6	REPEAT
850722	424. Longest Repeating Character Replacement	@October 27, 2022	45		strings	hashmapsliding window	medium	medium						https://leetcode.com/problems/longest-repeating-character-replacement/	123787	18000	6	REPEAT
850104	3. Longest Substring Without Repeating Characters	@October 16, 2022	20.57		strings	sliding window	medium	medium						https://leetcode.com/problems/longest-substring-without-repeating-characters/	139627	2057	6	REPEAT
847188	217. Contains Duplicate	@October 15, 2022	1.31		arrays	hashmap	easy	easy						https://leetcode.com/problems/contains-duplicate/	141067	131	6	DONE
824802	21. Merge Two Sorted Lists	@October 30, 2022	45		linkedlist	running pointers	easy	medium						https://leetcode.com/problems/merge-two-sorted-lists/	119467	18000	6	REPEAT
824802	133. Clone Graph	@October 30, 2022	45		graphs	bfsdfshashmap	medium	medium						https://leetcode.com/problems/clone-graph/description/	119467	18000	6	REPEAT
801810	49. Group Anagrams	@October 21, 2022	12.08		arrays	hashmapsorting	medium	medium						https://leetcode.com/problems/group-anagrams/description/	132427	1208	6	REPEATED
799380	572. Subtree of Another Tree	@October 21, 2022	8.03		trees	dfsrecursion	easy	medium						https://leetcode.com/problems/subtree-of-another-tree/description/	132427	803	6	REPEATED
792768	155. Min Stack	@October 22, 2022	11.41		stacks		medium	medium						https://leetcode.com/problems/min-stack/description/	130987	1141	6	REPEAT
790932	167. Two Sum II - Input Array Is Sorted	@October 22, 2022	8.35		arrays	binary searchrunning pointers	medium	easy						https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/	130987	835	6	REPEATED
790830	973. K Closest Points to Origin	@October 22, 2022	8.18		arrays	heap	medium	medium						https://leetcode.com/problems/k-closest-points-to-origin/description/	130987	818	6	REPEAT
790242	297. Serialize and Deserialize Binary Tree	@November 3, 2022	45		trees	dfs	hard	hard						https://leetcode.com/problems/serialize-and-deserialize-binary-tree/	113707	18000	6	REPEAT
790242	271. Encode and Decode Strings	@November 3, 2022	45		strings		medium	medium						https://leetcode.com/problems/encode-and-decode-strings/description/	113707	18000	6	REPEAT
788454	11. Container With Most Water	@October 22, 2022	4.22		arrays	running pointers	medium	medium						https://leetcode.com/problems/container-with-most-water/description/	130987	422	6	REPEATED
788322	1. Two Sum	@October 22, 2022	4		arrays	hashmap	easy	easy						https://leetcode.com/problems/two-sum/	130987	400	6	REPEATED
764160	875. Koko Eating Bananas	@October 26, 2022	21.33		arrays	binary search	medium	medium						https://leetcode.com/problems/koko-eating-bananas/description/	125227	2133	6	REPEATED
745332	206. Reverse Linked List	@October 27, 2022	4.35		linkedlist	running pointers	easy	easy						https://leetcode.com/problems/reverse-linked-list/description/	123787	435	6	REPEATED
740976	567. Permutation in String	@October 28, 2022	11.49		strings	hashmap	medium	medium						https://leetcode.com/problems/permutation-in-string/	122347	1149	6	REPEAT
740904	230. Kth Smallest Element in a BST	@October 28, 2022	11.37		trees	dfs	medium	medium						https://leetcode.com/problems/kth-smallest-element-in-a-bst/	122347	1137	6	REPEAT
735864	128. Longest Consecutive Sequence	@October 29, 2022	17.37		arrays	hashmapsortingunion find	medium	medium						https://leetcode.com/problems/longest-consecutive-sequence/	120907	1737	6	REPEATED
735366	200. Number of Islands	@October 29, 2022	16.54		graphsmatrix	dfs	medium	medium						https://leetcode.com/problems/number-of-islands/description/	120907	1654	6	REPEAT
729402	5. Longest Palindromic Substring	@November 10, 2022	45		strings	dynamic programming	medium	medium						https://leetcode.com/problems/longest-palindromic-substring/description/	103567	18000	6	REPEAT
721776	70. Climbing Stairs	@October 30, 2022	8.29		arrays	dynamic programming	easy	easy						https://leetcode.com/problems/climbing-stairs/description/	119467	829	6	REPEAT
720762	33. Search in Rotated Sorted Array	@November 11, 2022	45		arrays	binary search	medium	medium						https://leetcode.com/problems/search-in-rotated-sorted-array/description/	102127	18000	6	REPEAT
718602	136. Single Number	@October 30, 2022	3		arrays	bit	easy	easy						https://leetcode.com/problems/single-number/description/	119467	300	6	DONE
718602	704. Binary Search	@October 30, 2022	3		arrays	binary search	easy	easy						https://leetcode.com/problems/binary-search/description/	119467	300	6	DONE
717402	191. Number of 1 Bits	@October 30, 2022	1		numbers	bit	easy	easy						https://leetcode.com/problems/number-of-1-bits/description/	119467	100	6	REPEAT
705462	39. Combination Sum	@November 2, 2022	24.3		arrays	backtracking	medium	medium						https://leetcode.com/problems/combination-sum/description/	115147	2430	6	REPEAT
703482	90. Subsets II	@November 13, 2022	45		arrays	backtracking	medium	medium						https://leetcode.com/problems/subsets-ii/description/	99247	18000	6	REPEAT
702036	746. Min Cost Climbing Stairs	@November 2, 2022	18.59		arrays	dynamic programming	easy	medium						https://leetcode.com/problems/min-cost-climbing-stairs/description/	115147	1859	6	REPEAT
695214	695. Max Area of Island	@November 2, 2022	7.22		graphsmatrix	dfs	medium	easy						https://leetcode.com/problems/max-area-of-island/description/	115147	722	6	DONE
693090	74. Search a 2D Matrix	@November 3, 2022	18.08		matrix	binary search	medium	medium						https://leetcode.com/problems/search-a-2d-matrix/description/	113707	1808	6	REPEAT
691956	253. Meeting Rooms II	@November 3, 2022	16.19		arrays	intervalsorting	medium	medium						https://leetcode.com/problems/meeting-rooms-ii/description/	113707	1619	6	REPEAT
688998	46. Permutations	@November 3, 2022	11.26		arrays	backtracking	medium	medium						https://leetcode.com/problems/permutations/description/	113707	1126	6	REPEAT
687186	252. Meeting Rooms	@November 3, 2022	8.24		arrays	intervalsorting	easy	easy						https://leetcode.com/problems/meeting-rooms/description/	113707	824	6	REPEAT
675762	213. House Robber II	@November 5, 2022	18		arrays	dynamic programming	medium	medium						https://leetcode.com/problems/house-robber-ii/	110827	1800	6	REPEAT
672420	198. House Robber	@November 5, 2022	12.43		arrays	dynamic programming	medium	medium						https://leetcode.com/problems/house-robber/description/	110827	1243	6	REPEAT
650682	417. Pacific Atlantic Water Flow	@November 8, 2022	20		graphsmatrix	dfs	medium	medium						https://leetcode.com/problems/pacific-atlantic-water-flow/description/	106447	2000	6	REPEAT
634110	703. Kth Largest Element in a Stream	@November 10, 2022	21.18		strings	heap	easy	medium						https://leetcode.com/problems/kth-largest-element-in-a-stream/description/	103567	2118	6	REPEATED
630402	143. Reorder List	@November 10, 2022	15		linkedlist	running pointers	medium	medium						https://leetcode.com/problems/reorder-list/description/	103567	1500	6	REPEAT
625284	20. Valid Parentheses	@November 10, 2022	6.47		stacks		easy	easy						https://leetcode.com/problems/valid-parentheses/description/	103567	647	6	REPEATED
622200	141. Linked List Cycle	@November 10, 2022	1.33		linkedlist	hashmaprunning pointers	easy	easy						https://leetcode.com/problems/linked-list-cycle/description/	103567	133	6	DONE
612762	150. Evaluate Reverse Polish Notation	@November 11, 2022			stacksstrings		medium	easy						https://leetcode.com/problems/evaluate-reverse-polish-notation/description/	102127	0	6	REPEAT
612762	215. Kth Largest Element in an Array	@November 11, 2022			arrays	heapquick-select	medium	medium						https://leetcode.com/problems/kth-largest-element-in-an-array/description/	102127	0	6	REPEAT
604122	22. Generate Parentheses	@November 12, 2022			strings	backtracking	medium	medium						https://leetcode.com/problems/generate-parentheses/description/	100687	0	6	REPEAT
504762	57. Insert Interval	@December 6, 2022	45		arrays	intervalsorting	medium	medium						https://leetcode.com/problems/insert-interval/description/	66127	18000	6	REPEAT
478842	190. Reverse Bits	@December 9, 2022	45		numbers	bit	easy	easy						https://leetcode.com/problems/reverse-bits/description/	61807	18000	6	REPEAT
470202	435. Non-overlapping Intervals	@December 10, 2022	45		arrays	dynamic programminggreedyintervalsorting	medium	hard						https://leetcode.com/problems/non-overlapping-intervals/description/	60367	18000	6	REPEAT
418572	323. Number of Connected Components in an Undirected Graph	@December 4, 2022	7.55		graphs	dfsunion find	medium	medium						https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph/description/	69007	755	6	DONE
405384	56. Merge Intervals	@December 6, 2022	14.37		arrays	intervalsorting	medium	medium						https://leetcode.com/problems/merge-intervals/description/	66127	1437	6	REPEAT
373842	268. Missing Number	@December 9, 2022	5		arrays	bit	easy	easy						https://leetcode.com/problems/missing-number/description/	61807	500	6	REPEAT
176442	322. Coin Change	@January 13, 2023	45		arrays	dynamic programming	medium	medium						https://leetcode.com/problems/coin-change/description/	11407	18000	6	DONE
176442	416. Partition Equal Subset Sum	@January 13, 2023	45		arrays	backtrackingdynamic programminghashmap	medium	medium						https://leetcode.com/problems/partition-equal-subset-sum/description/	11407	18000	6	DONE
159162	787. Cheapest Flights Within K Stops	@January 15, 2023	45		graphs	bfsdynamic programminggreedyheap	medium	medium						https://leetcode.com/problems/cheapest-flights-within-k-stops/description/	8527	18000	6	DONE
132282	134. Gas Station	@January 7, 2023	20		arrays	greedy	medium	medium						https://leetcode.com/problems/gas-station/	20047	2000	6	DONE
131256	55. Jump Game	@January 7, 2023	18.29		arrays	dynamic programminggreedy	medium	medium						https://leetcode.com/problems/jump-game/description/	20047	1829	6	REP-2023
126906	846. Hand of Straights	@January 7, 2023	11.04		arrays	greedyhashmapsorting	medium	medium						https://leetcode.com/problems/hand-of-straights/description/	20047	1104	6	DONE
125682	45. Jump Game II	@January 7, 2023	9		arrays	dynamic programminggreedy	medium	medium						https://leetcode.com/problems/jump-game-ii/description/	20047	900	6	DONE
124170	1899. Merge Triplets to Form Target Triplet	@January 7, 2023	6.48		arrays	greedy	medium	medium						https://leetcode.com/problems/merge-triplets-to-form-target-triplet/description/	20047	648	6	DONE
124056	53. Maximum Subarray	@January 7, 2023	6.29		arrays	kadane	medium	medium						https://leetcode.com/problems/maximum-subarray/description/	20047	629	6	REP-2023
123732	763. Partition Labels	@January 8, 2023	20.15		arrays	greedyhashmapheapsorting	medium	medium						https://leetcode.com/problems/partition-labels/description/	18607	2015	6	DONE
108006	152. Maximum Product Subarray	@January 20, 2023	45		arrays	dynamic programming	medium	medium						https://leetcode.com/problems/maximum-product-subarray/description/	1	18000	6	DONE
108006	300. Longest Increasing Subsequence	@January 20, 2023	45		arrays	binary searchdynamic programming	medium	medium						https://leetcode.com/problems/longest-increasing-subsequence/	1	18000	6	DONE
108006	1143. Longest Common Subsequence	@January 20, 2023	45		strings	dynamic programming	medium	medium						https://leetcode.com/problems/longest-common-subsequence/	1	18000	6	DONE
13374	130. Surrounded Regions		22.29		matrix	bfsdfs	medium	easy						https://leetcode.com/problems/surrounded-regions/description/		2229	6	DONE
12924	36. Valid Sudoku		21.54		matrix	hashmap	medium	easy						https://leetcode.com/problems/valid-sudoku/		2154	6	DONE
6936	78. Subsets		11.56		arrays	backtracking	medium	easy						https://leetcode.com/problems/subsets/description/		1156	6	DONE
3750	1046. Last Stone Weight		6.25		arrays	heap	easy	easy						https://leetcode.com/problems/last-stone-weight/description/		625	6	DONE
1854	242. Valid Anagram		3.09		arrays	hashmap	easy	easy						https://leetcode.com/problems/valid-anagram/description/		309	6	DONE