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1	ID	Title	URL	Is Premium	Acceptance %	Difficulty	Frequency %
2	1	Two Sum	/problems/two-sum	N	49.1%	Easy	51.3461%;
3	2	Add Two Numbers	/problems/add-two-numbers	N	39.8%	Medium	29.1345%;
4	3	Longest Substring Without Repeating Characters	/problems/longest-substring-without-repeating-characters	N	33.8%	Medium	35.6042%;
5	4	Median of Two Sorted Arrays	/problems/median-of-two-sorted-arrays	N	35.3%	Hard	34.9848%;
6	5	Longest Palindromic Substring	/problems/longest-palindromic-substring	N	32.4%	Medium	35.2257%;
7	6	Zigzag Conversion	/problems/zigzag-conversion	N	43.2%	Medium	9.86584%;
8	7	Reverse Integer	/problems/reverse-integer	N	27.2%	Medium	13.4903%;
9	8	String to Integer (atoi)	/problems/string-to-integer-atoi	N	16.6%	Medium	12.1446%;
10	9	Palindrome Number	/problems/palindrome-number	N	52.9%	Easy	7.96144%;
11	10	Regular Expression Matching	/problems/regular-expression-matching	N	28.2%	Hard	10.2189%;
12	11	Container With Most Water	/problems/container-with-most-water	N	54.3%	Medium	22.1736%;
13	12	Integer to Roman	/problems/integer-to-roman	N	61.5%	Medium	49.3056%;
14	13	Roman to Integer	/problems/roman-to-integer	N	58.2%	Easy	34.3407%;
15	14	Longest Common Prefix	/problems/longest-common-prefix	N	40.8%	Easy	21.9424%;
16	15	3Sum	/problems/3sum	N	32.3%	Medium	23.5381%;
17	16	3Sum Closest	/problems/3sum-closest	N	46.1%	Medium	16.3659%;
18	17	Letter Combinations of a Phone Number	/problems/letter-combinations-of-a-phone-number	N	55.7%	Medium	49.0148%;
19	18	4Sum	/problems/4sum	N	36.4%	Medium	23.8879%;
20	19	Remove Nth Node From End of List	/problems/remove-nth-node-from-end-of-list	N	40.0%	Medium	7.89302%;
21	20	Valid Parentheses	/problems/valid-parentheses	N	40.6%	Easy	33.3355%;
22	21	Merge Two Sorted Lists	/problems/merge-two-sorted-lists	N	61.9%	Easy	15.4432%;
23	22	Generate Parentheses	/problems/generate-parentheses	N	71.9%	Medium	32.6884%;
24	23	Merge k Sorted Lists	/problems/merge-k-sorted-lists	N	48.5%	Hard	60.4348%;
25	24	Swap Nodes in Pairs	/problems/swap-nodes-in-pairs	N	60.5%	Medium	4.58918%;
26	25	Reverse Nodes in k-Group	/problems/reverse-nodes-in-k-group	N	53.7%	Hard	33.8612%;
27	26	Remove Duplicates from Sorted Array	/problems/remove-duplicates-from-sorted-array	N	50.9%	Easy	3.1666%;
28	27	Remove Element	/problems/remove-element	N	52.2%	Easy	0.91574%;
29	28	Find the Index of the First Occurrence in a String	/problems/find-the-index-of-the-first-occurrence-in-a-string	N	37.6%	Medium	5.46961%;
30	29	Divide Two Integers	/problems/divide-two-integers	N	17.3%	Medium	3.07981%;
31	30	Substring with Concatenation of All Words	/problems/substring-with-concatenation-of-all-words	N	30.9%	Hard	3.01616%;
32	31	Next Permutation	/problems/next-permutation	N	37.2%	Medium	27.6129%;
33	32	Longest Valid Parentheses	/problems/longest-valid-parentheses	N	32.7%	Hard	28.9085%;
34	33	Search in Rotated Sorted Array	/problems/search-in-rotated-sorted-array	N	38.7%	Medium	23.6618%;
35	34	Find First and Last Position of Element in Sorted Array	/problems/find-first-and-last-position-of-element-in-sorted-array	N	41.6%	Medium	23.5802%;
36	35	Search Insert Position	/problems/search-insert-position	N	42.0%	Easy	1.86362%;
37	36	Valid Sudoku	/problems/valid-sudoku	N	56.9%	Medium	32.0787%;
38	37	Sudoku Solver	/problems/sudoku-solver	N	56.8%	Hard	11.2049%;
39	38	Count and Say	/problems/count-and-say	N	51.3%	Medium	16.6455%;
40	39	Combination Sum	/problems/combination-sum	N	67.8%	Medium	11.805%;
41	40	Combination Sum II	/problems/combination-sum-ii	N	53.3%	Medium	4.62977%;
42	41	First Missing Positive	/problems/first-missing-positive	N	36.6%	Hard	25.4772%;
43	42	Trapping Rain Water	/problems/trapping-rain-water	N	58.8%	Hard	60.6992%;
44	43	Multiply Strings	/problems/multiply-strings	N	38.8%	Medium	1.18442%;
45	45	Jump Game II	/problems/jump-game-ii	N	38.6%	Medium	20.6912%;
46	46	Permutations	/problems/permutations	N	74.9%	Medium	22.0367%;
47	47	Permutations II	/problems/permutations-ii	N	56.8%	Medium	1.8021%;
48	48	Rotate Image	/problems/rotate-image	N	70.1%	Medium	21.5744%;
49	49	Group Anagrams	/problems/group-anagrams	N	66.5%	Medium	53.9385%;
50	50	Pow(x, n)	/problems/powx-n	N	32.8%	Medium	9.84183%;
51	51	N-Queens	/problems/n-queens	N	63.1%	Hard	19.3825%;
52	53	Maximum Subarray	/problems/maximum-subarray	N	50.1%	Medium	38.7427%;
53	54	Spiral Matrix	/problems/spiral-matrix	N	43.8%	Medium	14.6616%;
54	55	Jump Game	/problems/jump-game	N	38.5%	Medium	31.4782%;
55	56	Merge Intervals	/problems/merge-intervals	N	46.0%	Medium	41.4706%;
56	57	Insert Interval	/problems/insert-interval	N	38.0%	Medium	2.36219%;
57	58	Length of Last Word	/problems/length-of-last-word	N	40.8%	Easy	1.146%;
58	59	Spiral Matrix II	/problems/spiral-matrix-ii	N	66.7%	Medium	18.7633%;
59	60	Permutation Sequence	/problems/permutation-sequence	N	43.8%	Hard	12.4362%;
60	61	Rotate List	/problems/rotate-list	N	35.8%	Medium	6.77752%;
61	62	Unique Paths	/problems/unique-paths	N	62.3%	Medium	24.1998%;
62	63	Unique Paths II	/problems/unique-paths-ii	N	39.1%	Medium	28.0022%;
63	64	Minimum Path Sum	/problems/minimum-path-sum	N	60.7%	Medium	13.3017%;
64	65	Valid Number	/problems/valid-number	N	18.6%	Hard	5.22551%;
65	66	Plus One	/problems/plus-one	N	43.4%	Easy	1.48831%;
66	67	Add Binary	/problems/add-binary	N	51.4%	Easy	2.95509%;
67	69	Sqrt(x)	/problems/sqrtx	N	37.1%	Easy	1.7813%;
68	70	Climbing Stairs	/problems/climbing-stairs	N	51.8%	Easy	14.596%;
69	71	Simplify Path	/problems/simplify-path	N	39.2%	Medium	13.2314%;
70	72	Edit Distance	/problems/edit-distance	N	52.7%	Hard	17.5074%;
71	73	Set Matrix Zeroes	/problems/set-matrix-zeroes	N	50.1%	Medium	16.9228%;
72	74	Search a 2D Matrix	/problems/search-a-2d-matrix	N	47.0%	Medium	25.0299%;
73	75	Sort Colors	/problems/sort-colors	N	57.4%	Medium	15.6985%;
74	76	Minimum Window Substring	/problems/minimum-window-substring	N	40.7%	Hard	33.5563%;
75	78	Subsets	/problems/subsets	N	74.0%	Medium	15.2496%;
76	79	Word Search	/problems/word-search	N	39.8%	Medium	44.6295%;
77	81	Search in Rotated Sorted Array II	/problems/search-in-rotated-sorted-array-ii	N	35.8%	Medium	7.44691%;
78	82	Remove Duplicates from Sorted List II	/problems/remove-duplicates-from-sorted-list-ii	N	45.5%	Medium	4.08027%;
79	83	Remove Duplicates from Sorted List	/problems/remove-duplicates-from-sorted-list	N	49.9%	Easy	1.63519%;
80	84	Largest Rectangle in Histogram	/problems/largest-rectangle-in-histogram	N	42.2%	Hard	34.8942%;
81	85	Maximal Rectangle	/problems/maximal-rectangle	N	44.2%	Hard	18.9959%;
82	88	Merge Sorted Array	/problems/merge-sorted-array	N	45.8%	Easy	7.7498%;
83	90	Subsets II	/problems/subsets-ii	N	55.4%	Medium	9.89693%;
84	91	Decode Ways	/problems/decode-ways	N	32.3%	Medium	24.4712%;
85	92	Reverse Linked List II	/problems/reverse-linked-list-ii	N	45.4%	Medium	24.1387%;
86	93	Restore IP Addresses	/problems/restore-ip-addresses	N	43.5%	Medium	18.7251%;
87	94	Binary Tree Inorder Traversal	/problems/binary-tree-inorder-traversal	N	73.1%	Easy	6.36691%;
88	95	Unique Binary Search Trees II	/problems/unique-binary-search-trees-ii	N	51.6%	Medium	3.92098%;
89	97	Interleaving String	/problems/interleaving-string	N	37.1%	Medium	2.73105%;
90	98	Validate Binary Search Tree	/problems/validate-binary-search-tree	N	31.8%	Medium	22.7734%;
91	99	Recover Binary Search Tree	/problems/recover-binary-search-tree	N	50.4%	Medium	35.4319%;
92	100	Same Tree	/problems/same-tree	N	56.4%	Easy	5.60157%;
93	101	Symmetric Tree	/problems/symmetric-tree	N	53.0%	Easy	8.25677%;
94	102	Binary Tree Level Order Traversal	/problems/binary-tree-level-order-traversal	N	63.4%	Medium	14.2926%;
95	103	Binary Tree Zigzag Level Order Traversal	/problems/binary-tree-zigzag-level-order-traversal	N	55.2%	Medium	45.6783%;
96	104	Maximum Depth of Binary Tree	/problems/maximum-depth-of-binary-tree	N	73.2%	Easy	3.41217%;
97	105	Construct Binary Tree from Preorder and Inorder Traversal	/problems/construct-binary-tree-from-preorder-and-inorder-traversal	N	60.8%	Medium	18.6148%;
98	106	Construct Binary Tree from Inorder and Postorder Traversal	/problems/construct-binary-tree-from-inorder-and-postorder-traversal	N	57.5%	Medium	3.28802%;
99	107	Binary Tree Level Order Traversal II	/problems/binary-tree-level-order-traversal-ii	N	60.4%	Medium	9.3649%;
100	108	Convert Sorted Array to Binary Search Tree	/problems/convert-sorted-array-to-binary-search-tree	N	69.1%	Easy	5.35869%;
101	111	Minimum Depth of Binary Tree	/problems/minimum-depth-of-binary-tree	N	43.6%	Easy	2.68755%;
102	112	Path Sum	/problems/path-sum	N	47.7%	Easy	7.29483%;
103	113	Path Sum II	/problems/path-sum-ii	N	56.7%	Medium	13.4513%;
104	114	Flatten Binary Tree to Linked List	/problems/flatten-binary-tree-to-linked-list	N	61.2%	Medium	28.6009%;
105	116	Populating Next Right Pointers in Each Node	/problems/populating-next-right-pointers-in-each-node	N	59.5%	Medium	10.5132%;
106	117	Populating Next Right Pointers in Each Node II	/problems/populating-next-right-pointers-in-each-node-ii	N	49.8%	Medium	10.136%;
107	118	Pascal's Triangle	/problems/pascals-triangle	N	69.3%	Easy	17.5763%;
108	119	Pascal's Triangle II	/problems/pascals-triangle-ii	N	59.8%	Easy	3.35164%;
109	120	Triangle	/problems/triangle	N	54.0%	Medium	15.9416%;
110	121	Best Time to Buy and Sell Stock	/problems/best-time-to-buy-and-sell-stock	N	54.4%	Easy	38.0873%;
111	122	Best Time to Buy and Sell Stock II	/problems/best-time-to-buy-and-sell-stock-ii	N	63.4%	Medium	14.9094%;
112	123	Best Time to Buy and Sell Stock III	/problems/best-time-to-buy-and-sell-stock-iii	N	44.9%	Hard	21.9623%;
113	124	Binary Tree Maximum Path Sum	/problems/binary-tree-maximum-path-sum	N	38.5%	Hard	10.6127%;
114	125	Valid Palindrome	/problems/valid-palindrome	N	43.7%	Easy	0.355141%;
115	126	Word Ladder II	/problems/word-ladder-ii	N	27.6%	Hard	45.6066%;
116	127	Word Ladder	/problems/word-ladder	N	36.7%	Hard	67.7724%;
117	128	Longest Consecutive Sequence	/problems/longest-consecutive-sequence	N	48.9%	Medium	23.8238%;
118	129	Sum Root to Leaf Numbers	/problems/sum-root-to-leaf-numbers	N	58.8%	Medium	3.09701%;
119	130	Surrounded Regions	/problems/surrounded-regions	N	36.1%	Medium	9.20236%;
120	131	Palindrome Partitioning	/problems/palindrome-partitioning	N	62.5%	Medium	12.3657%;
121	132	Palindrome Partitioning II	/problems/palindrome-partitioning-ii	N	33.6%	Hard	4.75731%;
122	133	Clone Graph	/problems/clone-graph	N	50.8%	Medium	7.2969%;
123	134	Gas Station	/problems/gas-station	N	45.1%	Medium	24.4174%;
124	135	Candy	/problems/candy	N	40.8%	Hard	47.8847%;
125	136	Single Number	/problems/single-number	N	70.1%	Easy	10.5866%;
126	137	Single Number II	/problems/single-number-ii	N	57.9%	Medium	5.71668%;
127	138	Copy List with Random Pointer	/problems/copy-list-with-random-pointer	N	50.6%	Medium	55.2474%;
128	139	Word Break	/problems/word-break	N	45.5%	Medium	37.1035%;
129	140	Word Break II	/problems/word-break-ii	N	44.6%	Hard	59.804%;
130	141	Linked List Cycle	/problems/linked-list-cycle	N	46.9%	Easy	5.56001%;
131	142	Linked List Cycle II	/problems/linked-list-cycle-ii	N	46.5%	Medium	6.77774%;
132	143	Reorder List	/problems/reorder-list	N	51.2%	Medium	9.42272%;
133	146	LRU Cache	/problems/lru-cache	N	40.5%	Medium	83.3923%;
134	148	Sort List	/problems/sort-list	N	54.3%	Medium	5.46359%;
135	149	Max Points on a Line	/problems/max-points-on-a-line	N	21.8%	Hard	20.8625%;
136	150	Evaluate Reverse Polish Notation	/problems/evaluate-reverse-polish-notation	N	44.1%	Medium	29.22%;
137	151	Reverse Words in a String	/problems/reverse-words-in-a-string	N	31.8%	Medium	2.17467%;
138	152	Maximum Product Subarray	/problems/maximum-product-subarray	N	34.9%	Medium	23.4116%;
139	153	Find Minimum in Rotated Sorted Array	/problems/find-minimum-in-rotated-sorted-array	N	48.5%	Medium	9.30869%;
140	155	Min Stack	/problems/min-stack	N	51.9%	Medium	23.9141%;
141	159	Longest Substring with At Most Two Distinct Characters	/problems/longest-substring-with-at-most-two-distinct-characters	Y	53.5%	Medium	15.4166%;
142	160	Intersection of Two Linked Lists	/problems/intersection-of-two-linked-lists	N	53.4%	Easy	0.858184%;
143	162	Find Peak Element	/problems/find-peak-element	N	46.2%	Medium	5.38548%;
144	165	Compare Version Numbers	/problems/compare-version-numbers	N	35.4%	Medium	29.347%;
145	167	Two Sum II - Input Array Is Sorted	/problems/two-sum-ii-input-array-is-sorted	N	60.0%	Medium	16.114%;
146	168	Excel Sheet Column Title	/problems/excel-sheet-column-title	N	34.8%	Easy	2.5692%;
147	169	Majority Element	/problems/majority-element	N	63.9%	Easy	9.48009%;
148	173	Binary Search Tree Iterator	/problems/binary-search-tree-iterator	N	69.2%	Medium	11.9399%;
149	175	Combine Two Tables	/problems/combine-two-tables	N	73.1%	Easy	3.25329%;
150	176	Second Highest Salary	/problems/second-highest-salary	N	36.6%	Medium	6.06025%;
151	177	Nth Highest Salary	/problems/nth-highest-salary	N	37.5%	Medium	12.9019%;
152	178	Rank Scores	/problems/rank-scores	N	60.1%	Medium	2.7637%;
153	179	Largest Number	/problems/largest-number	N	34.1%	Medium	11.5127%;
154	180	Consecutive Numbers	/problems/consecutive-numbers	N	46.8%	Medium	6.82667%;
155	181	Employees Earning More Than Their Managers	/problems/employees-earning-more-than-their-managers	N	68.6%	Easy	1.57702%;
156	183	Customers Who Never Order	/problems/customers-who-never-order	N	68.1%	Easy	0.688879%;
157	184	Department Highest Salary	/problems/department-highest-salary	N	49.7%	Medium	2.44257%;
158	185	Department Top Three Salaries	/problems/department-top-three-salaries	N	50.1%	Hard	16.4829%;
159	188	Best Time to Buy and Sell Stock IV	/problems/best-time-to-buy-and-sell-stock-iv	N	38.0%	Hard	23.6439%;
160	189	Rotate Array	/problems/rotate-array	N	39.2%	Medium	8.55056%;
161	190	Reverse Bits	/problems/reverse-bits	N	52.4%	Easy	7.88937%;
162	191	Number of 1 Bits	/problems/number-of-1-bits	N	65.0%	Easy	8.67044%;
163	193	Valid Phone Numbers	/problems/valid-phone-numbers	N	26.0%	Easy	9.23742%;
164	196	Delete Duplicate Emails	/problems/delete-duplicate-emails	N	59.0%	Easy	4.29197%;
165	197	Rising Temperature	/problems/rising-temperature	N	44.6%	Easy	3.93585%;
166	198	House Robber	/problems/house-robber	N	48.8%	Medium	33.7973%;
167	199	Binary Tree Right Side View	/problems/binary-tree-right-side-view	N	61.2%	Medium	24.1406%;
168	200	Number of Islands	/problems/number-of-islands	N	56.4%	Medium	80.2562%;
169	202	Happy Number	/problems/happy-number	N	54.4%	Easy	6.49479%;
170	203	Remove Linked List Elements	/problems/remove-linked-list-elements	N	44.9%	Easy	0.857125%;
171	204	Count Primes	/problems/count-primes	N	33.1%	Medium	4.23389%;
172	205	Isomorphic Strings	/problems/isomorphic-strings	N	42.6%	Easy	4.7513%;
173	206	Reverse Linked List	/problems/reverse-linked-list	N	72.5%	Easy	7.12827%;
174	207	Course Schedule	/problems/course-schedule	N	45.4%	Medium	55.8441%;
175	208	Implement Trie (Prefix Tree)	/problems/implement-trie-prefix-tree	N	61.0%	Medium	15.1699%;
176	209	Minimum Size Subarray Sum	/problems/minimum-size-subarray-sum	N	44.5%	Medium	1.13415%;
177	210	Course Schedule II	/problems/course-schedule-ii	N	48.0%	Medium	47.5932%;
178	211	Design Add and Search Words Data Structure	/problems/design-add-and-search-words-data-structure	N	43.0%	Medium	14.8327%;
179	212	Word Search II	/problems/word-search-ii	N	36.9%	Hard	42.8948%;
180	213	House Robber II	/problems/house-robber-ii	N	40.7%	Medium	2.81862%;
181	215	Kth Largest Element in an Array	/problems/kth-largest-element-in-an-array	N	65.8%	Medium	29.2225%;
182	217	Contains Duplicate	/problems/contains-duplicate	N	61.3%	Easy	15.6385%;
183	218	The Skyline Problem	/problems/the-skyline-problem	N	41.6%	Hard	6.16011%;
184	219	Contains Duplicate II	/problems/contains-duplicate-ii	N	42.3%	Easy	11.8172%;
185	220	Contains Duplicate III	/problems/contains-duplicate-iii	N	22.0%	Hard	5.74849%;
186	221	Maximal Square	/problems/maximal-square	N	44.6%	Medium	15.1382%;
187	222	Count Complete Tree Nodes	/problems/count-complete-tree-nodes	N	59.7%	Medium	3.71078%;
188	224	Basic Calculator	/problems/basic-calculator	N	41.2%	Hard	32.2893%;
189	226	Invert Binary Tree	/problems/invert-binary-tree	N	73.3%	Easy	8.37921%;
190	227	Basic Calculator II	/problems/basic-calculator-ii	N	42.2%	Medium	46.3177%;
191	230	Kth Smallest Element in a BST	/problems/kth-smallest-element-in-a-bst	N	69.4%	Medium	5.62457%;
192	231	Power of Two	/problems/power-of-two	N	45.7%	Easy	2.07361%;
193	232	Implement Queue using Stacks	/problems/implement-queue-using-stacks	N	61.3%	Easy	8.74861%;
194	234	Palindrome Linked List	/problems/palindrome-linked-list	N	49.6%	Easy	14.3147%;
195	235	Lowest Common Ancestor of a Binary Search Tree	/problems/lowest-common-ancestor-of-a-binary-search-tree	N	60.3%	Medium	7.82009%;
196	236	Lowest Common Ancestor of a Binary Tree	/problems/lowest-common-ancestor-of-a-binary-tree	N	58.1%	Medium	43.3451%;
197	237	Delete Node in a Linked List	/problems/delete-node-in-a-linked-list	N	75.3%	Medium	11.2657%;
198	238	Product of Array Except Self	/problems/product-of-array-except-self	N	64.7%	Medium	22.7322%;
199	239	Sliding Window Maximum	/problems/sliding-window-maximum	N	46.6%	Hard	55.9204%;
200	240	Search a 2D Matrix II	/problems/search-a-2d-matrix-ii	N	50.6%	Medium	13.215%;
201	242	Valid Anagram	/problems/valid-anagram	N	62.8%	Easy	22.6983%;
202	243	Shortest Word Distance	/problems/shortest-word-distance	Y	64.9%	Easy	25.7592%;