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1
IDTitleAcceptanceDifficultyFrequencyLeetcode Question Link
2
1095Find in Mountain Array35.8%Hard0.5901861366220961 https://leetcode.com/problems/find-in-mountain-array
3
284Peeking Iterator45.7%Medium0.540892616315496 https://leetcode.com/problems/peeking-iterator
4
1Two Sum45.6%Easy0.5261466153527387 https://leetcode.com/problems/two-sum
5
391Perfect Rectangle30.5%Hard0.46850000514186985 https://leetcode.com/problems/perfect-rectangle
6
428Serialize and Deserialize N-ary Tree59.4%Hard0.41085339493100104 https://leetcode.com/problems/serialize-and-deserialize-n-ary-tree
7
146LRU Cache33.2%Medium0.3532067847201322 https://leetcode.com/problems/lru-cache
8
1229Meeting Scheduler52.7%Medium0.2955601745092634 https://leetcode.com/problems/meeting-scheduler
9
981Time Based Key-Value Store53.1%Medium0.24353082235287765 https://leetcode.com/problems/time-based-key-value-store
10
295Find Median from Data Stream44.3%Hard0.24172686903184679 https://leetcode.com/problems/find-median-from-data-stream
11
212Word Search II34.9%Hard0.22101415243595443 https://leetcode.com/problems/word-search-ii
12
4Median of Two Sorted Arrays29.6%Hard0.17519711082846595 https://leetcode.com/problems/median-of-two-sorted-arrays
13
341Flatten Nested List Iterator52.9%Medium0.16689882926772934 https://leetcode.com/problems/flatten-nested-list-iterator
14
53Maximum Subarray46.5%Easy0.16188416901715558 https://leetcode.com/problems/maximum-subarray
15
546Remove Boxes42.7%Hard0.14361551169114867 https://leetcode.com/problems/remove-boxes
16
836Rectangle Overlap48.6%Easy0.14261022668001652 https://leetcode.com/problems/rectangle-overlap
17
348Design Tic-Tac-Toe54.3%Medium0.14252878462127264 https://leetcode.com/problems/design-tic-tac-toe
18
200Number of Islands46.8%Medium0.13260852442964066 https://leetcode.com/problems/number-of-islands
19
49Group Anagrams56.9%Medium0.1285763065181971 https://leetcode.com/problems/group-anagrams
20
2Add Two Numbers33.9%Medium0.12829971534891174 https://leetcode.com/problems/add-two-numbers
21
329Longest Increasing Path in a Matrix43.4%Hard0.11459264165812869 https://leetcode.com/problems/longest-increasing-path-in-a-matrix
22
311Sparse Matrix Multiplication61.9%Medium0.10648348040245009 https://leetcode.com/problems/sparse-matrix-multiplication
23
403Frog Jump39.7%Hard0.0998958412956442 https://leetcode.com/problems/frog-jump
24
658Find K Closest Elements40.9%Medium0.0995648587647672 https://leetcode.com/problems/find-k-closest-elements
25
609Find Duplicate File in System59.5%Medium0.09898183354885093 https://leetcode.com/problems/find-duplicate-file-in-system
26
837New 21 Game34.6%Medium0.09646026618756222 https://leetcode.com/problems/new-21-game
27
87Scramble String33.7%Hard0.09333193979221914 https://leetcode.com/problems/scramble-string
28
139Word Break40.1%Medium0.09308175178767038 https://leetcode.com/problems/word-break
29
36Valid Sudoku48.7%Medium0.08547738976568439 https://leetcode.com/problems/valid-sudoku
30
42Trapping Rain Water48.9%Hard0.08461041545209161 https://leetcode.com/problems/trapping-rain-water
31
688Knight Probability in Chessboard48.9%Medium0.08392620769993404 https://leetcode.com/problems/knight-probability-in-chessboard
32
909Snakes and Ladders38.4%Medium0.08392620769993404 https://leetcode.com/problems/snakes-and-ladders
33
636Exclusive Time of Functions52.0%Medium0.08155306616046964 https://leetcode.com/problems/exclusive-time-of-functions
34
729My Calendar I51.8%Medium0.0801854119192299 https://leetcode.com/problems/my-calendar-i
35
97Interleaving String31.5%Hard0.07948571541724253 https://leetcode.com/problems/interleaving-string
36
128Longest Consecutive Sequence45.1%Hard0.0786603197723907 https://leetcode.com/problems/longest-consecutive-sequence
37
269Alien Dictionary33.3%Hard0.0770322180463687 https://leetcode.com/problems/alien-dictionary
38
351Android Unlock Patterns48.4%Medium0.07197349962508924 https://leetcode.com/problems/android-unlock-patterns
39
632Smallest Range Covering Elements from K Lists52.4%Hard0.07082605256861242 https://leetcode.com/problems/smallest-range-covering-elements-from-k-lists
40
187Repeated DNA Sequences38.9%Medium0.06947237281476738 https://leetcode.com/problems/repeated-dna-sequences
41
178Rank Scores45.8%Medium0.06551667145414991 https://leetcode.com/problems/rank-scores
42
23Merge k Sorted Lists40.2%Hard0.06293239083543646 https://leetcode.com/problems/merge-k-sorted-lists
43
472Concatenated Words43.7%Hard0.06120196522807572 https://leetcode.com/problems/concatenated-words
44
48Rotate Image56.7%Medium0.06069974483040549 https://leetcode.com/problems/rotate-image
45
88Merge Sorted Array39.4%Easy0.059258174101133876 https://leetcode.com/problems/merge-sorted-array
46
54Spiral Matrix34.1%Medium0.05783815482970009 https://leetcode.com/problems/spiral-matrix
47
362Design Hit Counter63.7%Medium0.05622967649867821 https://leetcode.com/problems/design-hit-counter
48
56Merge Intervals39.3%Medium0.054167920212564245 https://leetcode.com/problems/merge-intervals
49
1221Split a String in Balanced Strings83.3%Easy0.05362640133807673 https://leetcode.com/problems/split-a-string-in-balanced-strings
50
1275Find Winner on a Tic Tac Toe Game52.8%Easy0.05292240145434251 https://leetcode.com/problems/find-winner-on-a-tic-tac-toe-game
51
12Integer to Roman55.1%Medium0.05217122936969127 https://leetcode.com/problems/integer-to-roman
52
14Longest Common Prefix35.4%Easy0.051846064173015856 https://leetcode.com/problems/longest-common-prefix
53
253Meeting Rooms II45.7%Medium0.04945628059066218 https://leetcode.com/problems/meeting-rooms-ii
54
388Longest Absolute File Path41.8%Medium0.04849434993861047 https://leetcode.com/problems/longest-absolute-file-path
55
238Product of Array Except Self60.1%Medium0.04711503937510501 https://leetcode.com/problems/product-of-array-except-self
56
453Minimum Moves to Equal Array Elements50.2%Easy0.04652001563489285 https://leetcode.com/problems/minimum-moves-to-equal-array-elements
57
3Longest Substring Without Repeating Characters30.4%Medium0.04601922329309672 https://leetcode.com/problems/longest-substring-without-repeating-characters
58
223Rectangle Area37.8%Medium0.04598511324182338 https://leetcode.com/problems/rectangle-area
59
93Restore IP Addresses35.6%Medium0.04393092922572675 https://leetcode.com/problems/restore-ip-addresses
60
642Design Search Autocomplete System44.7%Hard0.04334372921647208 https://leetcode.com/problems/design-search-autocomplete-system
61
490The Maze51.4%Medium0.04287902305923364 https://leetcode.com/problems/the-maze
62
545Boundary of Binary Tree38.9%Medium0.04158603377810283 https://leetcode.com/problems/boundary-of-binary-tree
63
266Palindrome Permutation61.9%Easy0.04158603377810283 https://leetcode.com/problems/palindrome-permutation
64
37Sudoku Solver43.6%Hard0.040527833612118376 https://leetcode.com/problems/sudoku-solver
65
184Sum33.7%Medium0.03880215185647971 https://leetcode.com/problems/4sum
66
168Excel Sheet Column Title31.1%Easy0.03861483612777958 https://leetcode.com/problems/excel-sheet-column-title
67
202Happy Number50.4%Easy0.03853744444187023 https://leetcode.com/problems/happy-number
68
863All Nodes Distance K in Binary Tree55.4%Medium0.037756162417993476 https://leetcode.com/problems/all-nodes-distance-k-in-binary-tree
69
34Find First and Last Position of Element in Sorted Array36.2%Medium0.03759448672488506 https://leetcode.com/problems/find-first-and-last-position-of-element-in-sorted-array
70
206Reverse Linked List62.5%Easy0.03679633286058156 https://leetcode.com/problems/reverse-linked-list
71
5Longest Palindromic Substring29.5%Medium0.035860192879893796 https://leetcode.com/problems/longest-palindromic-substring
72
886Possible Bipartition44.2%Medium0.034103901828857086 https://leetcode.com/problems/possible-bipartition
73
480Sliding Window Median37.2%Hard0.03373001037669306 https://leetcode.com/problems/sliding-window-median
74
102Binary Tree Level Order Traversal54.6%Medium0.03228400889291332 https://leetcode.com/problems/binary-tree-level-order-traversal
75
133Clone Graph34.8%Medium0.03215711163453134 https://leetcode.com/problems/clone-graph
76
177Nth Highest Salary31.4%Medium0.032054026290083464 https://leetcode.com/problems/nth-highest-salary
77
867Transpose Matrix62.8%Easy0.031179454774354007 https://leetcode.com/problems/transpose-matrix
78
179Largest Number28.8%Medium0.03093030069135863 https://leetcode.com/problems/largest-number
79
75Sort Colors47.3%Medium0.030801991570373215 https://leetcode.com/problems/sort-colors
80
13Roman to Integer55.7%Easy0.030443751414723153 https://leetcode.com/problems/roman-to-integer
81
415Add Strings47.5%Easy0.030009753867991852 https://leetcode.com/problems/add-strings
82
135Candy31.6%Hard0.029764101906453892 https://leetcode.com/problems/candy
83
297Serialize and Deserialize Binary Tree47.5%Hard0.028013036227673965 https://leetcode.com/problems/serialize-and-deserialize-binary-tree
84
518Coin Change 250.2%Medium0.027969505010125056 https://leetcode.com/problems/coin-change-2
85
227Basic Calculator II36.9%Medium0.027685557859864054 https://leetcode.com/problems/basic-calculator-ii
86
273Integer to English Words27.1%Hard0.026980053764546055 https://leetcode.com/problems/integer-to-english-words
87
986Interval List Intersections67.3%Medium0.026731618438329555 https://leetcode.com/problems/interval-list-intersections
88
931Minimum Falling Path Sum62.5%Medium0.02672169681715245 https://leetcode.com/problems/minimum-falling-path-sum
89
153Sum26.8%Medium0.02661031301111795 https://leetcode.com/problems/3sum
90
417Pacific Atlantic Water Flow41.1%Medium0.025975486403260657 https://leetcode.com/problems/pacific-atlantic-water-flow
91
143Reorder List37.1%Medium0.025870945598649286 https://leetcode.com/problems/reorder-list
92
283Move Zeroes57.8%Easy0.025673520193393074 https://leetcode.com/problems/move-zeroes
93
218The Skyline Problem34.6%Hard0.025479085300984906 https://leetcode.com/problems/the-skyline-problem
94
733Flood Fill55.3%Easy0.02506396866321625 https://leetcode.com/problems/flood-fill
95
140Word Break II32.6%Hard0.024104005752813337 https://leetcode.com/problems/word-break-ii
96
31Next Permutation32.6%Medium0.023747034562878154 https://leetcode.com/problems/next-permutation
97
8String to Integer (atoi)15.4%Medium0.023470848345506903 https://leetcode.com/problems/string-to-integer-atoi
98
198House Robber42.0%Easy0.023256862164267263 https://leetcode.com/problems/house-robber
99
647Palindromic Substrings60.6%Medium0.023250853650202817 https://leetcode.com/problems/palindromic-substrings
100
25Reverse Nodes in k-Group42.1%Hard0.022832042042645793 https://leetcode.com/problems/reverse-nodes-in-k-group
101
622Design Circular Queue43.7%Medium0.02246023667974994 https://leetcode.com/problems/design-circular-queue
102
108Convert Sorted Array to Binary Search Tree57.9%Easy0.022033389270751453 https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree
103
287Find the Duplicate Number55.5%Medium0.021825992579766168 https://leetcode.com/problems/find-the-duplicate-number
104
359Logger Rate Limiter70.8%Easy0.021053409197832343 https://leetcode.com/problems/logger-rate-limiter
105
670Maximum Swap43.6%Medium0.020844944430365928 https://leetcode.com/problems/maximum-swap
106
33Search in Rotated Sorted Array34.5%Medium0.0200182839715896 https://leetcode.com/problems/search-in-rotated-sorted-array
107
525Contiguous Array42.8%Medium0.01975372873623256 https://leetcode.com/problems/contiguous-array
108
268Missing Number51.7%Easy0.019380451549662482 https://leetcode.com/problems/missing-number
109
669Trim a Binary Search Tree63.0%Easy0.019139340210697423 https://leetcode.com/problems/trim-a-binary-search-tree
110
515Find Largest Value in Each Tree Row61.1%Medium0.019093658815579673 https://leetcode.com/problems/find-largest-value-in-each-tree-row
111
121Best Time to Buy and Sell Stock50.5%Easy0.018954919107260947 https://leetcode.com/problems/best-time-to-buy-and-sell-stock
112
617Merge Two Binary Trees74.1%Easy0.018496211633622316 https://leetcode.com/problems/merge-two-binary-trees
113
394Decode String50.0%Medium0.0182820448374491 https://leetcode.com/problems/decode-string
114
126Word Ladder II22.1%Hard0.017994187717865196 https://leetcode.com/problems/word-ladder-ii
115
54201 Matrix39.8%Medium0.01796993548494071 https://leetcode.com/problems/01-matrix
116
706Design HashMap61.3%Easy0.01752893260576219 https://leetcode.com/problems/design-hashmap
117
163Sum Closest46.0%Medium0.016854331554982106 https://leetcode.com/problems/3sum-closest
118
46Permutations63.5%Medium0.016759583649075344 https://leetcode.com/problems/permutations
119
387First Unique Character in a String53.4%Easy0.016637588725633846 https://leetcode.com/problems/first-unique-character-in-a-string
120
7Reverse Integer25.8%Easy0.016627790608488954 https://leetcode.com/problems/reverse-integer
121
242Valid Anagram56.9%Easy0.016513947375674708 https://leetcode.com/problems/valid-anagram
122
509Fibonacci Number67.2%Easy0.01593518138579736 https://leetcode.com/problems/fibonacci-number
123
125Valid Palindrome36.7%Easy0.01582781088607703 https://leetcode.com/problems/valid-palindrome
124
59Spiral Matrix II53.9%Medium0.01579187969789165 https://leetcode.com/problems/spiral-matrix-ii
125
86Partition List41.5%Medium0.01578564744229187 https://leetcode.com/problems/partition-list
126
1002Find Common Characters67.6%Easy0.015273301861833809 https://leetcode.com/problems/find-common-characters
127
528Random Pick with Weight43.9%Medium0.014831565905995232 https://leetcode.com/problems/random-pick-with-weight
128
41First Missing Positive32.0%Hard0.014368063266920193 https://leetcode.com/problems/first-missing-positive
129
371Sum of Two Integers50.7%Medium0.014064929467403538 https://leetcode.com/problems/sum-of-two-integers
130
21Merge Two Sorted Lists53.5%Easy0.014012111332134735 https://leetcode.com/problems/merge-two-sorted-lists
131
443String Compression41.3%Easy0.01390843004613198 https://leetcode.com/problems/string-compression
132
141Linked List Cycle41.1%Easy0.01390238743679306 https://leetcode.com/problems/linked-list-cycle
133
703Kth Largest Element in a Stream49.7%Easy0.013898764390814973 https://leetcode.com/problems/kth-largest-element-in-a-stream
134
332Reconstruct Itinerary36.7%Medium0.013755375068485329 https://leetcode.com/problems/reconstruct-itinerary
135
767Reorganize String48.7%Medium0.01329806830463147 https://leetcode.com/problems/reorganize-string
136
120Triangle44.2%Medium0.013236460625830901 https://leetcode.com/problems/triangle
137
82Remove Duplicates from Sorted List II36.8%Medium0.01297035044262745 https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii
138
77Combinations54.7%Medium0.01255115315451512 https://leetcode.com/problems/combinations
139
167Two Sum II - Input array is sorted54.1%Easy0.012349223898473458 https://leetcode.com/problems/two-sum-ii-input-array-is-sorted
140
445Add Two Numbers II54.5%Medium0.01233061245747872 https://leetcode.com/problems/add-two-numbers-ii
141
442Find All Duplicates in an Array67.8%Medium0.011675555865241341 https://leetcode.com/problems/find-all-duplicates-in-an-array
142
136Single Number65.5%Easy0.011429512235126808 https://leetcode.com/problems/single-number
143
232Implement Queue using Stacks49.6%Easy0.011242389348933884 https://leetcode.com/problems/implement-queue-using-stacks
144
171Excel Sheet Column Number55.9%Easy0.011195191092491645 https://leetcode.com/problems/excel-sheet-column-number
145
104Maximum Depth of Binary Tree66.0%Easy0.011105055822701604 https://leetcode.com/problems/maximum-depth-of-binary-tree
146
155Min Stack44.5%Easy0.010653509851791077 https://leetcode.com/problems/min-stack
147
211Add and Search Word - Data structure design38.1%Medium0.010438508143923443 https://leetcode.com/problems/add-and-search-word-data-structure-design
148
234Palindrome Linked List39.3%Easy0.010171877938733932 https://leetcode.com/problems/palindrome-linked-list
149
221Maximal Square37.7%Medium0.00988638798855515 https://leetcode.com/problems/maximal-square
150
22Generate Parentheses62.7%Medium0.009785877810632554 https://leetcode.com/problems/generate-parentheses
151
47Permutations II46.4%Medium0.009673594178378379 https://leetcode.com/problems/permutations-ii
152
905Sort Array By Parity74.1%Easy0.009603915354180344 https://leetcode.com/problems/sort-array-by-parity
153
151Reverse Words in a String21.9%Medium0.009570916441992467 https://leetcode.com/problems/reverse-words-in-a-string
154
45Jump Game II30.6%Hard0.009546611883579968 https://leetcode.com/problems/jump-game-ii
155
347Top K Frequent Elements61.2%Medium0.009249390740121013 https://leetcode.com/problems/top-k-frequent-elements
156
43Multiply Strings33.9%Medium0.009145011150062768 https://leetcode.com/problems/multiply-strings
157
32Longest Valid Parentheses28.4%Hard0.009111680351255843 https://leetcode.com/problems/longest-valid-parentheses
158
322Coin Change35.5%Medium0.00904437880665999 https://leetcode.com/problems/coin-change
159
28Implement strStr()34.5%Easy0.008850485542574548 https://leetcode.com/problems/implement-strstr
160
215Kth Largest Element in an Array55.4%Medium0.008759180089881562 https://leetcode.com/problems/kth-largest-element-in-an-array
161
977Squares of a Sorted Array72.1%Easy0.008733679968754604 https://leetcode.com/problems/squares-of-a-sorted-array
162
153Find Minimum in Rotated Sorted Array45.1%Medium0.008430963288799368 https://leetcode.com/problems/find-minimum-in-rotated-sorted-array
163
239Sliding Window Maximum43.0%Hard0.007898935224534491 https://leetcode.com/problems/sliding-window-maximum
164
175Combine Two Tables60.8%Easy0.007696786120491369 https://leetcode.com/problems/combine-two-tables
165
240Search a 2D Matrix II43.2%Medium0.0075829747244553335 https://leetcode.com/problems/search-a-2d-matrix-ii
166
692Top K Frequent Words51.8%Medium0.007516006820935329 https://leetcode.com/problems/top-k-frequent-words
167
191Number of 1 Bits49.8%Easy0.007472480128219255 https://leetcode.com/problems/number-of-1-bits
168
176Second Highest Salary31.6%Easy0.007393749024938284 https://leetcode.com/problems/second-highest-salary
169
344Reverse String68.5%Easy0.00734157796234515 https://leetcode.com/problems/reverse-string
170
73Set Matrix Zeroes43.1%Medium0.0070151111959223245 https://leetcode.com/problems/set-matrix-zeroes
171
114Flatten Binary Tree to Linked List49.3%Medium0.006896579059060353 https://leetcode.com/problems/flatten-binary-tree-to-linked-list
172
11Container With Most Water50.8%Medium0.006889188300412141 https://leetcode.com/problems/container-with-most-water
173
448Find All Numbers Disappeared in an Array55.9%Easy0.006863444924982415 https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array
174
9Palindrome Number48.4%Easy0.006822343017166543 https://leetcode.com/problems/palindrome-number
175
29Divide Two Integers16.4%Medium0.006772799340092467 https://leetcode.com/problems/divide-two-integers
176
118Pascal's Triangle52.5%Easy0.006749941254175012 https://leetcode.com/problems/pascals-triangle
177
142Linked List Cycle II37.3%Medium0.006564934131150057 https://leetcode.com/problems/linked-list-cycle-ii
178
83Remove Duplicates from Sorted List45.4%Easy0.006353261522609498 https://leetcode.com/problems/remove-duplicates-from-sorted-list
179
162Find Peak Element43.3%Medium0.006350235659345837 https://leetcode.com/problems/find-peak-element
180
76Minimum Window Substring34.6%Hard0.006231520398723243 https://leetcode.com/problems/minimum-window-substring
181
24Swap Nodes in Pairs50.4%Medium0.0062218275061505365 https://leetcode.com/problems/swap-nodes-in-pairs
182
127Word Ladder29.6%Medium0.005979091056058075 https://leetcode.com/problems/word-ladder
183
973K Closest Points to Origin63.8%Medium0.005773688094426333 https://leetcode.com/problems/k-closest-points-to-origin
184
39Combination Sum56.1%Medium0.005715934396440999 https://leetcode.com/problems/combination-sum
185
124Binary Tree Maximum Path Sum34.3%Hard0.005531752454833179 https://leetcode.com/problems/binary-tree-maximum-path-sum
186
226Invert Binary Tree65.0%Easy0.005508138409792252 https://leetcode.com/problems/invert-binary-tree
187
300Longest Increasing Subsequence42.6%Medium0.005264555460003242 https://leetcode.com/problems/longest-increasing-subsequence
188
350Intersection of Two Arrays II51.4%Easy0.005210380421193978 https://leetcode.com/problems/intersection-of-two-arrays-ii
189
236Lowest Common Ancestor of a Binary Tree45.7%Medium0.004714210262726446 https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
190
169Majority Element58.7%Easy0.004706444738837472 https://leetcode.com/problems/majority-element
191
35Search Insert Position42.6%Easy0.004646848510375352 https://leetcode.com/problems/search-insert-position
192
17Letter Combinations of a Phone Number46.8%Medium0.0044018999217624675 https://leetcode.com/problems/letter-combinations-of-a-phone-number
193
210Course Schedule II40.7%Medium0.0042893974831731225 https://leetcode.com/problems/course-schedule-ii
194
190Reverse Bits39.8%Easy0.004116549745909879 https://leetcode.com/problems/reverse-bits
195
103Binary Tree Zigzag Level Order Traversal48.3%Medium0.003839922800048048 https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
196
67Add Binary45.2%Easy0.003735684238128885 https://leetcode.com/problems/add-binary
197
78Subsets62.0%Medium0.00368765975195334 https://leetcode.com/problems/subsets
198
70Climbing Stairs47.8%Easy0.00339085548316782 https://leetcode.com/problems/climbing-stairs
199
122Best Time to Buy and Sell Stock II57.0%Easy0.0033545821461532107 https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii
200
66Plus One43.0%Easy0.00326211347832938 https://leetcode.com/problems/plus-one
201
20Valid Parentheses39.0%Easy0.0023005704055949323 https://leetcode.com/problems/valid-parentheses
202
260Single Number III64.3%Medium0.0020288097849578786 https://leetcode.com/problems/single-number-iii