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Chore: Add headers to all the files (krishnadey30#54)

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1	ID	Title	Acceptance	Difficulty	Frequency	Leetcode Question Link
2	138	Copy List with Random Pointer	36.4%	Medium	2.9916072330367776	https://leetcode.com/problems/copy-list-with-random-pointer
3	146	LRU Cache	33.2%	Medium	2.88011930741835	https://leetcode.com/problems/lru-cache
4	1396	Design Underground System	64.7%	Medium	2.7686313817999224	https://leetcode.com/problems/design-underground-system
5	430	Flatten a Multilevel Doubly Linked List	55.1%	Medium	2.699294019942542	https://leetcode.com/problems/flatten-a-multilevel-doubly-linked-list
6	200	Number of Islands	46.8%	Medium	2.5893928602940184	https://leetcode.com/problems/number-of-islands
7	445	Add Two Numbers II	54.5%	Medium	2.5005209232280814	https://leetcode.com/problems/add-two-numbers-ii
8	723	Candy Crush	69.2%	Medium	2.4433718804091535	https://leetcode.com/problems/candy-crush
9	394	Decode String	50.0%	Medium	2.4354178381724667	https://leetcode.com/problems/decode-string
10	582	Kill Process	60.8%	Medium	2.329004207705794	https://leetcode.com/problems/kill-process
11	1	Two Sum	45.6%	Easy	2.2663379529079926	https://leetcode.com/problems/two-sum
12	451	Sort Characters By Frequency	63.0%	Medium	2.214754567267123	https://leetcode.com/problems/sort-characters-by-frequency
13	2	Add Two Numbers	33.9%	Medium	2.2105161651535843	https://leetcode.com/problems/add-two-numbers
14	1169	Invalid Transactions	31.2%	Medium	2.1276788037634873	https://leetcode.com/problems/invalid-transactions
15	117	Populating Next Right Pointers in Each Node II	39.1%	Medium	2.118212486885331	https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
16	42	Trapping Rain Water	48.9%	Hard	2.0660776889450734	https://leetcode.com/problems/trapping-rain-water
17	20	Valid Parentheses	39.0%	Easy	2.0208637675689056	https://leetcode.com/problems/valid-parentheses
18	380	Insert Delete GetRandom O(1)	47.5%	Medium	1.9093758419504783	https://leetcode.com/problems/insert-delete-getrandom-o1
19	155	Min Stack	44.5%	Easy	1.8753356079546997	https://leetcode.com/problems/min-stack
20	98	Validate Binary Search Tree	27.8%	Medium	1.8280334735241495	https://leetcode.com/problems/validate-binary-search-tree
21	253	Meeting Rooms II	45.7%	Medium	1.7748254445172882	https://leetcode.com/problems/meeting-rooms-ii
22	121	Best Time to Buy and Sell Stock	50.5%	Easy	1.7316498584399342	https://leetcode.com/problems/best-time-to-buy-and-sell-stock
23	387	First Unique Character in a String	53.4%	Easy	1.6717206372907538	https://leetcode.com/problems/first-unique-character-in-a-string
24	56	Merge Intervals	39.3%	Medium	1.6344853036753995	https://leetcode.com/problems/merge-intervals
25	214	Shortest Palindrome	29.8%	Hard	1.628304607593452	https://leetcode.com/problems/shortest-palindrome
26	1274	Number of Ships in a Rectangle	66.3%	Hard	1.6253239794553143	https://leetcode.com/problems/number-of-ships-in-a-rectangle
27	1029	Two City Scheduling	56.1%	Easy	1.6062408497394156	https://leetcode.com/problems/two-city-scheduling
28	283	Move Zeroes	57.8%	Easy	1.5700380214242422	https://leetcode.com/problems/move-zeroes
29	116	Populating Next Right Pointers in Each Node	45.2%	Medium	1.5282163044390433	https://leetcode.com/problems/populating-next-right-pointers-in-each-node
30	390	Elimination Game	44.5%	Medium	1.435519307483543	https://leetcode.com/problems/elimination-game
31	3	Longest Substring Without Repeating Characters	30.4%	Medium	1.3959826812294072	https://leetcode.com/problems/longest-substring-without-repeating-characters
32	23	Merge k Sorted Lists	40.2%	Hard	1.390362038117481	https://leetcode.com/problems/merge-k-sorted-lists
33	1209	Remove All Adjacent Duplicates in String II	56.9%	Medium	1.2788741124990537	https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string-ii
34	463	Island Perimeter	65.7%	Easy	1.245274068255333	https://leetcode.com/problems/island-perimeter
35	242	Valid Anagram	56.9%	Easy	1.1337861426369056	https://leetcode.com/problems/valid-anagram
36	269	Alien Dictionary	33.3%	Hard	1.099252698552309	https://leetcode.com/problems/alien-dictionary
37	114	Flatten Binary Tree to Linked List	49.3%	Medium	1.0986122886681096	https://leetcode.com/problems/flatten-binary-tree-to-linked-list
38	139	Word Break	40.1%	Medium	1.0903842081598691	https://leetcode.com/problems/word-break
39	4	Median of Two Sorted Arrays	29.6%	Hard	1.0617282987657621	https://leetcode.com/problems/median-of-two-sorted-arrays
40	271	Encode and Decode Strings	31.5%	Medium	1.0528027526368156	https://leetcode.com/problems/encode-and-decode-strings
41	33	Search in Rotated Sorted Array	34.5%	Medium	1.0520357838367607	https://leetcode.com/problems/search-in-rotated-sorted-array
42	12	Integer to Roman	55.1%	Medium	1.0302007147147747	https://leetcode.com/problems/integer-to-roman
43	206	Reverse Linked List	62.5%	Easy	1.0194232916385328	https://leetcode.com/problems/reverse-linked-list
44	301	Remove Invalid Parentheses	43.3%	Hard	1.0163915378390016	https://leetcode.com/problems/remove-invalid-parentheses
45	21	Merge Two Sorted Lists	53.5%	Easy	0.9730025194287449	https://leetcode.com/problems/merge-two-sorted-lists
46	7	Reverse Integer	25.8%	Easy	0.9636538129651142	https://leetcode.com/problems/reverse-integer
47	69	Sqrt(x)	33.9%	Easy	0.9425416082510271	https://leetcode.com/problems/sqrtx
48	628	Maximum Product of Three Numbers	47.1%	Easy	0.9179560111932162	https://leetcode.com/problems/maximum-product-of-three-numbers
49	15	3Sum	26.8%	Medium	0.9115464188984339	https://leetcode.com/problems/3sum
50	346	Moving Average from Data Stream	70.9%	Easy	0.893574774039618	https://leetcode.com/problems/moving-average-from-data-stream
51	105	Construct Binary Tree from Preorder and Inorder Traversal	48.8%	Medium	0.856966942738701	https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
52	554	Brick Wall	50.0%	Medium	0.8487112881843506	https://leetcode.com/problems/brick-wall
53	460	LFU Cache	34.2%	Hard	0.8452742509276767	https://leetcode.com/problems/lfu-cache
54	53	Maximum Subarray	46.5%	Easy	0.8338660450189812	https://leetcode.com/problems/maximum-subarray
55	692	Top K Frequent Words	51.8%	Medium	0.8219759071619612	https://leetcode.com/problems/top-k-frequent-words
56	5	Longest Palindromic Substring	29.5%	Medium	0.8154521489335768	https://leetcode.com/problems/longest-palindromic-substring
57	239	Sliding Window Maximum	43.0%	Hard	0.8060721931479718	https://leetcode.com/problems/sliding-window-maximum
58	295	Find Median from Data Stream	44.3%	Hard	0.7864008043695105	https://leetcode.com/problems/find-median-from-data-stream
59	62	Unique Paths	54.1%	Medium	0.7819517612115802	https://leetcode.com/problems/unique-paths
60	236	Lowest Common Ancestor of a Binary Tree	45.7%	Medium	0.7585897524597297	https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
61	54	Spiral Matrix	34.1%	Medium	0.7505169147393441	https://leetcode.com/problems/spiral-matrix
62	273	Integer to English Words	27.1%	Hard	0.7404748586772619	https://leetcode.com/problems/integer-to-english-words
63	611	Valid Triangle Number	48.4%	Medium	0.7357067949787413	https://leetcode.com/problems/valid-triangle-number
64	160	Intersection of Two Linked Lists	40.6%	Easy	0.7095335003665627	https://leetcode.com/problems/intersection-of-two-linked-lists
65	332	Reconstruct Itinerary	36.7%	Medium	0.6934933810134637	https://leetcode.com/problems/reconstruct-itinerary
66	987	Vertical Order Traversal of a Binary Tree	36.6%	Medium	0.6653429641530142	https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree
67	173	Binary Search Tree Iterator	56.6%	Medium	0.6626352388032212	https://leetcode.com/problems/binary-search-tree-iterator
68	10	Regular Expression Matching	26.8%	Hard	0.6273817982285409	https://leetcode.com/problems/regular-expression-matching
69	122	Best Time to Buy and Sell Stock II	57.0%	Easy	0.620692101344523	https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
70	49	Group Anagrams	56.9%	Medium	0.6192590691619644	https://leetcode.com/problems/group-anagrams
71	797	All Paths From Source to Target	77.9%	Medium	0.6133054173259477	https://leetcode.com/problems/all-paths-from-source-to-target
72	102	Binary Tree Level Order Traversal	54.6%	Medium	0.598984719563006	https://leetcode.com/problems/binary-tree-level-order-traversal
73	127	Word Ladder	29.6%	Medium	0.5839478885949534	https://leetcode.com/problems/word-ladder
74	443	String Compression	41.3%	Easy	0.5809942743419542	https://leetcode.com/problems/string-compression
75	88	Merge Sorted Array	39.4%	Easy	0.571985667665598	https://leetcode.com/problems/merge-sorted-array
76	314	Binary Tree Vertical Order Traversal	45.3%	Medium	0.5697543914580919	https://leetcode.com/problems/binary-tree-vertical-order-traversal
77	384	Shuffle an Array	52.8%	Medium	0.5613156759328372	https://leetcode.com/problems/shuffle-an-array
78	235	Lowest Common Ancestor of a Binary Search Tree	49.9%	Easy	0.5565464902832835	https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree
79	322	Coin Change	35.5%	Medium	0.5515361644679891	https://leetcode.com/problems/coin-change
80	78	Subsets	62.0%	Medium	0.5447142447216986	https://leetcode.com/problems/subsets
81	1472	Design Browser History	64.6%	Medium	0.5365781198684054	https://leetcode.com/problems/design-browser-history
82	399	Evaluate Division	51.6%	Medium	0.5332723866487983	https://leetcode.com/problems/evaluate-division
83	140	Word Break II	32.6%	Hard	0.5270660323324061	https://leetcode.com/problems/word-break-ii
84	72	Edit Distance	44.8%	Hard	0.4973447790261514	https://leetcode.com/problems/edit-distance
85	199	Binary Tree Right Side View	54.1%	Medium	0.48753322716717645	https://leetcode.com/problems/binary-tree-right-side-view
86	662	Maximum Width of Binary Tree	41.0%	Medium	0.4763908360365309	https://leetcode.com/problems/maximum-width-of-binary-tree
87	759	Employee Free Time	66.3%	Hard	0.4763656648250958	https://leetcode.com/problems/employee-free-time
88	84	Largest Rectangle in Histogram	35.2%	Hard	0.47303377627978027	https://leetcode.com/problems/largest-rectangle-in-histogram
89	8	String to Integer (atoi)	15.4%	Medium	0.4660655155190756	https://leetcode.com/problems/string-to-integer-atoi
90	128	Longest Consecutive Sequence	45.1%	Hard	0.4586585434961303	https://leetcode.com/problems/longest-consecutive-sequence
91	41	First Missing Positive	32.0%	Hard	0.4577280774627401	https://leetcode.com/problems/first-missing-positive
92	162	Find Peak Element	43.3%	Medium	0.4542122961558814	https://leetcode.com/problems/find-peak-element
93	739	Daily Temperatures	63.3%	Medium	0.4492773337550074	https://leetcode.com/problems/daily-temperatures
94	328	Odd Even Linked List	55.7%	Medium	0.44107885769261934	https://leetcode.com/problems/odd-even-linked-list
95	126	Word Ladder II	22.1%	Hard	0.43777160210436394	https://leetcode.com/problems/word-ladder-ii
96	50	Pow(x;n)	30.3%	Medium	0.4274653596092084	https://leetcode.com/problems/powx-n
97	535	Encode and Decode TinyURL	79.9%	Medium	0.4221173972425086	https://leetcode.com/problems/encode-and-decode-tinyurl
98	347	Top K Frequent Elements	61.2%	Medium	0.4113452979974663	https://leetcode.com/problems/top-k-frequent-elements
99	234	Palindrome Linked List	39.3%	Easy	0.40610862095331074	https://leetcode.com/problems/palindrome-linked-list
100	488	Zuma Game	39.9%	Hard	0.3999856423435388	https://leetcode.com/problems/zuma-game
101	118	Pascal's Triangle	52.5%	Easy	0.3983282893707838	https://leetcode.com/problems/pascals-triangle
102	31	Next Permutation	32.6%	Medium	0.3965135773768611	https://leetcode.com/problems/next-permutation
103	11	Container With Most Water	50.8%	Medium	0.3920877580285051	https://leetcode.com/problems/container-with-most-water
104	496	Next Greater Element I	63.8%	Easy	0.39096401741736453	https://leetcode.com/problems/next-greater-element-i
105	171	Excel Sheet Column Number	55.9%	Easy	0.3891015365515057	https://leetcode.com/problems/excel-sheet-column-number
106	9	Palindrome Number	48.4%	Easy	0.3889248192216875	https://leetcode.com/problems/palindrome-number
107	1047	Remove All Adjacent Duplicates In String	68.6%	Easy	0.38744859425846845	https://leetcode.com/problems/remove-all-adjacent-duplicates-in-string
108	34	Find First and Last Position of Element in Sorted Array	36.2%	Medium	0.3847852205330874	https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
109	349	Intersection of Two Arrays	62.5%	Easy	0.3823387899165356	https://leetcode.com/problems/intersection-of-two-arrays
110	311	Sparse Matrix Multiplication	61.9%	Medium	0.37117603462953225	https://leetcode.com/problems/sparse-matrix-multiplication
111	79	Word Search	35.6%	Medium	0.355241060704579	https://leetcode.com/problems/word-search
112	44	Wildcard Matching	24.7%	Hard	0.34881383996175425	https://leetcode.com/problems/wildcard-matching
113	362	Design Hit Counter	63.7%	Medium	0.34451909789108437	https://leetcode.com/problems/design-hit-counter
114	230	Kth Smallest Element in a BST	60.2%	Medium	0.3413184800841155	https://leetcode.com/problems/kth-smallest-element-in-a-bst
115	124	Binary Tree Maximum Path Sum	34.3%	Hard	0.33702679091242466	https://leetcode.com/problems/binary-tree-maximum-path-sum
116	268	Missing Number	51.7%	Easy	0.3338128467131867	https://leetcode.com/problems/missing-number
117	64	Minimum Path Sum	54.5%	Medium	0.3317195432884912	https://leetcode.com/problems/minimum-path-sum
118	215	Kth Largest Element in an Array	55.4%	Medium	0.3300278321382259	https://leetcode.com/problems/kth-largest-element-in-an-array
119	353	Design Snake Game	34.2%	Medium	0.32931497055013925	https://leetcode.com/problems/design-snake-game
120	46	Permutations	63.5%	Medium	0.32304289477761106	https://leetcode.com/problems/permutations
121	221	Maximal Square	37.7%	Medium	0.3057737602882765	https://leetcode.com/problems/maximal-square
122	17	Letter Combinations of a Phone Number	46.8%	Medium	0.30552675752628056	https://leetcode.com/problems/letter-combinations-of-a-phone-number
123	205	Isomorphic Strings	39.8%	Easy	0.30101800626340847	https://leetcode.com/problems/isomorphic-strings
124	75	Sort Colors	47.3%	Medium	0.2778743740687611	https://leetcode.com/problems/sort-colors
125	695	Max Area of Island	62.7%	Medium	0.2770125235595406	https://leetcode.com/problems/max-area-of-island
126	136	Single Number	65.5%	Easy	0.27522969174444734	https://leetcode.com/problems/single-number
127	22	Generate Parentheses	62.7%	Medium	0.274428104404814	https://leetcode.com/problems/generate-parentheses
128	229	Majority Element II	35.6%	Medium	0.2683771567744578	https://leetcode.com/problems/majority-element-ii
129	503	Next Greater Element II	56.5%	Medium	0.26590939545778536	https://leetcode.com/problems/next-greater-element-ii
130	209	Minimum Size Subarray Sum	38.2%	Medium	0.26557641498817536	https://leetcode.com/problems/minimum-size-subarray-sum
131	694	Number of Distinct Islands	56.0%	Medium	0.26236426446749106	https://leetcode.com/problems/number-of-distinct-islands
132	422	Valid Word Square	37.7%	Easy	0.2578291093020998	https://leetcode.com/problems/valid-word-square
133	252	Meeting Rooms	54.6%	Easy	0.2539330877151399	https://leetcode.com/problems/meeting-rooms
134	286	Walls and Gates	54.5%	Medium	0.2531417471996048	https://leetcode.com/problems/walls-and-gates
135	48	Rotate Image	56.7%	Medium	0.2525907526405108	https://leetcode.com/problems/rotate-image
136	821	Shortest Distance to a Character	66.9%	Easy	0.24320527953164725	https://leetcode.com/problems/shortest-distance-to-a-character
137	240	Search a 2D Matrix II	43.2%	Medium	0.24218097481422138	https://leetcode.com/problems/search-a-2d-matrix-ii
138	716	Max Stack	42.6%	Easy	0.24108416003009112	https://leetcode.com/problems/max-stack
139	85	Maximal Rectangle	37.7%	Hard	0.2404427185770219	https://leetcode.com/problems/maximal-rectangle
140	63	Unique Paths II	34.6%	Medium	0.2348446787507317	https://leetcode.com/problems/unique-paths-ii
141	76	Minimum Window Substring	34.6%	Hard	0.23436338587849237	https://leetcode.com/problems/minimum-window-substring
142	572	Subtree of Another Tree	44.1%	Easy	0.23328636844031944	https://leetcode.com/problems/subtree-of-another-tree
143	151	Reverse Words in a String	21.9%	Medium	0.23114347137583938	https://leetcode.com/problems/reverse-words-in-a-string
144	412	Fizz Buzz	62.3%	Easy	0.23023806672070082	https://leetcode.com/problems/fizz-buzz
145	652	Find Duplicate Subtrees	50.2%	Medium	0.23015822831359434	https://leetcode.com/problems/find-duplicate-subtrees
146	924	Minimize Malware Spread	42.0%	Hard	0.22884157242884745	https://leetcode.com/problems/minimize-malware-spread
147	91	Decode Ways	24.7%	Medium	0.2254754606491885	https://leetcode.com/problems/decode-ways
148	238	Product of Array Except Self	60.1%	Medium	0.22477655808124566	https://leetcode.com/problems/product-of-array-except-self
149	1223	Dice Roll Simulation	45.6%	Medium	0.2166710368085923	https://leetcode.com/problems/dice-roll-simulation
150	560	Subarray Sum Equals K	43.9%	Medium	0.21610695147886494	https://leetcode.com/problems/subarray-sum-equals-k
151	442	Find All Duplicates in an Array	67.8%	Medium	0.21334822899856468	https://leetcode.com/problems/find-all-duplicates-in-an-array
152	6	ZigZag Conversion	36.3%	Medium	0.21040551802808702	https://leetcode.com/problems/zigzag-conversion
153	287	Find the Duplicate Number	55.5%	Medium	0.20950804936372536	https://leetcode.com/problems/find-the-duplicate-number
154	315	Count of Smaller Numbers After Self	41.5%	Hard	0.20806843787404064	https://leetcode.com/problems/count-of-smaller-numbers-after-self
155	232	Implement Queue using Stacks	49.6%	Easy	0.20615437352136948	https://leetcode.com/problems/implement-queue-using-stacks
156	208	Implement Trie (Prefix Tree)	49.4%	Medium	0.20593713931590088	https://leetcode.com/problems/implement-trie-prefix-tree
157	16	3Sum Closest	46.0%	Medium	0.2058081329110988	https://leetcode.com/problems/3sum-closest
158	513	Find Bottom Left Tree Value	61.5%	Medium	0.20328581918106378	https://leetcode.com/problems/find-bottom-left-tree-value
159	543	Diameter of Binary Tree	48.4%	Easy	0.2027481163433401	https://leetcode.com/problems/diameter-of-binary-tree
160	836	Rectangle Overlap	48.6%	Easy	0.19944370144318244	https://leetcode.com/problems/rectangle-overlap
161	13	Roman to Integer	55.7%	Easy	0.19870163716069	https://leetcode.com/problems/roman-to-integer
162	510	Inorder Successor in BST II	58.0%	Medium	0.19714257713870645	https://leetcode.com/problems/inorder-successor-in-bst-ii
163	329	Longest Increasing Path in a Matrix	43.4%	Hard	0.1954447382872236	https://leetcode.com/problems/longest-increasing-path-in-a-matrix
164	1060	Missing Element in Sorted Array	54.5%	Medium	0.1950605825713844	https://leetcode.com/problems/missing-element-in-sorted-array
165	94	Binary Tree Inorder Traversal	63.3%	Medium	0.1948180665300998	https://leetcode.com/problems/binary-tree-inorder-traversal
166	120	Triangle	44.2%	Medium	0.19325424809414601	https://leetcode.com/problems/triangle
167	92	Reverse Linked List II	38.8%	Medium	0.19248981022320735	https://leetcode.com/problems/reverse-linked-list-ii
168	153	Find Minimum in Rotated Sorted Array	45.1%	Medium	0.191995528322351	https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
169	207	Course Schedule	43.1%	Medium	0.19082802919680183	https://leetcode.com/problems/course-schedule
170	402	Remove K Digits	28.4%	Medium	0.18924199963852842	https://leetcode.com/problems/remove-k-digits
171	658	Find K Closest Elements	40.9%	Medium	0.18663941293482042	https://leetcode.com/problems/find-k-closest-elements
172	518	Coin Change 2	50.2%	Medium	0.18373876827436816	https://leetcode.com/problems/coin-change-2
173	889	Construct Binary Tree from Preorder and Postorder Traversal	66.2%	Medium	0.18315872720701828	https://leetcode.com/problems/construct-binary-tree-from-preorder-and-postorder-traversal
174	70	Climbing Stairs	47.8%	Easy	0.1820258821345787	https://leetcode.com/problems/climbing-stairs
175	226	Invert Binary Tree	65.0%	Easy	0.18135450553395235	https://leetcode.com/problems/invert-binary-tree
176	19	Remove Nth Node From End of List	35.2%	Medium	0.17998225417577363	https://leetcode.com/problems/remove-nth-node-from-end-of-list
177	203	Remove Linked List Elements	38.6%	Easy	0.17950766176348673	https://leetcode.com/problems/remove-linked-list-elements
178	1244	Design A Leaderboard	60.7%	Medium	0.17763094743610072	https://leetcode.com/problems/design-a-leaderboard
179	202	Happy Number	50.4%	Easy	0.17408932588103054	https://leetcode.com/problems/happy-number
180	1249	Minimum Remove to Make Valid Parentheses	62.5%	Medium	0.17148553745267525	https://leetcode.com/problems/minimum-remove-to-make-valid-parentheses
181	97	Interleaving String	31.5%	Hard	0.17070662167607636	https://leetcode.com/problems/interleaving-string
182	344	Reverse String	68.5%	Easy	0.16907996884887766	https://leetcode.com/problems/reverse-string
183	971	Flip Binary Tree To Match Preorder Traversal	45.7%	Medium	0.1670540846631662	https://leetcode.com/problems/flip-binary-tree-to-match-preorder-traversal
184	529	Minesweeper	59.1%	Medium	0.16635770580494058	https://leetcode.com/problems/minesweeper
185	727	Minimum Window Subsequence	41.8%	Hard	0.15970111035790735	https://leetcode.com/problems/minimum-window-subsequence
186	101	Symmetric Tree	46.8%	Easy	0.15457702816029933	https://leetcode.com/problems/symmetric-tree
187	414	Third Maximum Number	30.5%	Easy	0.15407631103237035	https://leetcode.com/problems/third-maximum-number
188	417	Pacific Atlantic Water Flow	41.1%	Medium	0.15226921172755276	https://leetcode.com/problems/pacific-atlantic-water-flow
189	470	Implement Rand10() Using Rand7()	46.3%	Medium	0.15154989812720093	https://leetcode.com/problems/implement-rand10-using-rand7
190	386	Lexicographical Numbers	51.6%	Medium	0.14854271203296188	https://leetcode.com/problems/lexicographical-numbers
191	504	Base 7	46.2%	Easy	0.14612656455721032	https://leetcode.com/problems/base-7
192	24	Swap Nodes in Pairs	50.4%	Medium	0.14499222491243005	https://leetcode.com/problems/swap-nodes-in-pairs
193	237	Delete Node in a Linked List	63.8%	Easy	0.14499031042859406	https://leetcode.com/problems/delete-node-in-a-linked-list
194	852	Peak Index in a Mountain Array	71.6%	Easy	0.1445812288111076	https://leetcode.com/problems/peak-index-in-a-mountain-array
195	415	Add Strings	47.5%	Easy	0.14343082219506165	https://leetcode.com/problems/add-strings
196	426	Convert Binary Search Tree to Sorted Doubly Linked List	59.1%	Medium	0.14252878462127264	https://leetcode.com/problems/convert-binary-search-tree-to-sorted-doubly-linked-list
197	348	Design Tic-Tac-Toe	54.3%	Medium	0.14252878462127264	https://leetcode.com/problems/design-tic-tac-toe
198	188	Best Time to Buy and Sell Stock IV	28.0%	Hard	0.1396533313293086	https://leetcode.com/problems/best-time-to-buy-and-sell-stock-iv
199	225	Implement Stack using Queues	45.1%	Easy	0.1390589799907463	https://leetcode.com/problems/implement-stack-using-queues
200	250	Count Univalue Subtrees	52.0%	Medium	0.13767409129953323	https://leetcode.com/problems/count-univalue-subtrees
201	71	Simplify Path	32.6%	Medium	0.13762137787604775	https://leetcode.com/problems/simplify-path
202	565	Array Nesting	55.5%	Medium	0.13762137787604775	https://leetcode.com/problems/array-nesting