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DifficultyTopic145 of 145
No.ProblemDifficultyFrequency
1Two Sum
Sliding Window
Easy
100.0%
3Longest Substring Without Repeating Characters
StringTree
Medium
100.0%
68Text JustificationHard
100.0%
3046Split the Array
Array
Easy
100.0%
1861Rotating the BoxMedium
100.0%
3459Length of Longest V-Shaped Diagonal SegmentHard
100.0%
153SumMedium
87.5%
121Best Time to Buy and Sell StockEasy
87.5%
1389Create Target Array in the Given Order
Array
Easy
87.5%
146LRU CacheMedium
87.5%
3043Find the Length of the Longest Common Prefix
DP
Medium
87.5%
3071Minimum Operations to Write the Letter Y on a GridMedium
87.5%
5Longest Palindromic Substring
StringTree
Medium
75.0%
20Valid Parentheses
Stack/Queue
Easy
75.0%
42Trapping Rain WaterHard
75.0%
49Group Anagrams
String
Medium
75.0%
53Maximum Subarray
Array
Medium
75.0%
1025Divisor GameEasy
75.0%
2049Count Nodes With the Highest Score
Linked List
Medium
75.0%
2078Two Furthest Houses With Different ColorsEasy
75.0%
2136Earliest Possible Day of Full BloomHard
75.0%
3078Match Alphanumerical Pattern in Matrix I
Array
Medium
75.0%
1353Maximum Number of Events That Can Be Attended
Math
Medium
75.0%
2451Odd String Difference
String
Easy
75.0%
3161Block Placement QueriesHard
75.0%
200Number of Islands
GraphMath
Medium
75.0%
71Simplify PathMedium
75.0%
2672Number of Adjacent Elements With the Same Color
Math
Medium
75.0%
2768Number of Black Blocks
Math
Medium
75.0%
56Merge IntervalsMedium
75.0%
84Largest Rectangle in HistogramHard
75.0%
2964Number of Divisible Triplet Sums
Math
Medium
75.0%
3915Maximum Sum of Alternating Subsequence With Distance at Least K
String
Hard
75.0%
14Longest Common Prefix
DP
Easy
62.5%
286Walls and GatesMedium
62.5%
54Spiral Matrix
Array
Medium
62.5%
539Minimum Time DifferenceMedium
62.5%
206Reverse Linked List
Linked List
Easy
62.5%
2817Minimum Absolute Difference Between Elements With ConstraintMedium
62.5%
3552Grid Teleportation TraversalMedium
62.5%
560Subarray Sum Equals K
Array
Medium
62.5%
48Rotate ImageMedium
62.5%
2491Divide Players Into Teams of Equal SkillMedium
62.5%
526Beautiful ArrangementMedium
62.5%
2484Count Palindromic Subsequences
String
Hard
62.5%
636Exclusive Time of FunctionsMedium
62.5%
207Course ScheduleMedium
50.0%
1497Check If Array Pairs Are Divisible by k
Array
Medium
50.0%
543Diameter of Binary Tree
Tree
Easy
50.0%
661Image SmootherEasy
50.0%
1438Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Array
Medium
50.0%
347Top K Frequent Elements
Heap
Medium
50.0%
127Word LadderHard
50.0%
93Restore IP AddressesMedium
50.0%
11Container With Most WaterMedium
50.0%
723Candy CrushMedium
50.0%
21Merge Two Sorted ListsEasy
50.0%
792Number of Matching Subsequences
StringMath
Medium
50.0%
110Balanced Binary Tree
Tree
Easy
50.0%
295Find Median from Data Stream
Heap
Hard
50.0%
32Longest Valid Parentheses
Stack/Queue
Hard
50.0%
122Best Time to Buy and Sell Stock IIMedium
50.0%
75Sort ColorsMedium
50.0%
238Product of Array Except Self
Array
Medium
50.0%
202Happy Number
Math
Easy
50.0%
1314Matrix Block Sum
Array
Medium
50.0%
134Gas StationMedium
50.0%
67Add BinaryEasy
50.0%
415Add Strings
String
Easy
50.0%
3019Number of Changing Keys
Math
Easy
50.0%
3652Best Time to Buy and Sell Stock using StrategyMedium
50.0%
3651Minimum Cost Path with TeleportationsHard
50.0%
3649Number of Perfect Pairs
Math
Medium
50.0%
1648Sell Diminishing-Valued Colored BallsMedium
50.0%
131Palindrome Partitioning
StringDP
Medium
50.0%
2680Maximum ORMedium
50.0%
1963Minimum Number of Swaps to Make the String Balanced
StringMath
Medium
50.0%
2466Count Ways To Build Good Strings
String
Medium
50.0%
66Plus OneEasy
37.5%
151Reverse Words in a String
String
Medium
37.5%
739Daily TemperaturesMedium
37.5%
2593Find Score of an Array After Marking All Elements
Array
Medium
37.5%
25Reverse Nodes in k-Group
Linked List
Hard
37.5%
189Rotate Array
Array
Medium
37.5%
242Valid Anagram
String
Easy
37.5%
123Best Time to Buy and Sell Stock IIIHard
37.5%
162Find Peak Element
Binary Search
Medium
37.5%
239Sliding Window Maximum
Sliding Window
Hard
37.5%
416Partition Equal Subset Sum
DP
Medium
37.5%
1876Substrings of Size Three with Distinct Characters
StringTree
Easy
37.5%
3034Number of Subarrays That Match a Pattern I
ArrayMath
Medium
37.5%
213House Robber IIMedium
37.5%
72Edit Distance
DP
Medium
37.5%
2021Brightest Position on Street
Tree
Medium
37.5%
217Contains DuplicateEasy
37.5%
129Sum Root to Leaf Numbers
Math
Medium
37.5%
460LFU CacheHard
37.5%
300Longest Increasing Subsequence
String
Medium
37.5%
451Sort Characters By FrequencyMedium
37.5%
1752Check if Array Is Sorted and Rotated
ArrayBinary Search
Easy
37.5%
215Kth Largest Element in an Array
ArrayHeap
Medium
37.5%
345Reverse Vowels of a String
String
Easy
37.5%
680Valid Palindrome II
String
Easy
37.5%
167Two Sum II - Input Array Is Sorted
ArraySliding Window
Medium
37.5%
264Ugly Number II
Math
Medium
37.5%
62Unique PathsMedium
37.5%
1743Restore the Array From Adjacent Pairs
Array
Medium
37.5%
17Letter Combinations of a Phone Number
Math
Medium
37.5%
332Reconstruct ItineraryHard
37.5%
2502Design Memory AllocatorMedium
37.5%
1046Last Stone WeightEasy
37.5%
3433Count Mentions Per UserMedium
37.5%
85Maximal RectangleHard
37.5%
258Add Digits
Math
Easy
37.5%
135CandyHard
37.5%
2544Alternating Digit Sum
Math
Easy
37.5%
503Next Greater Element IIMedium
37.5%
79Word SearchMedium
37.5%
88Merge Sorted Array
Array
Easy
37.5%
994Rotting OrangesMedium
37.5%
974Subarray Sums Divisible by K
Array
Medium
37.5%
128Longest Consecutive SequenceMedium
37.5%
125Valid Palindrome
String
Easy
37.5%
387First Unique Character in a String
String
Easy
37.5%
1922Count Good Numbers
Math
Medium
37.5%
846Hand of StraightsMedium
37.5%
435Non-overlapping IntervalsMedium
37.5%
2530Maximal Score After Applying K OperationsMedium
37.5%
733Flood Fill
Graph
Easy
37.5%
253Meeting Rooms IIMedium
37.5%
139Word BreakMedium
37.5%
140Word Break IIHard
37.5%
3035Maximum Palindromes After Operations
String
Medium
37.5%
1696Jump Game VIMedium
37.5%
1631Path With Minimum EffortMedium
37.5%
1011Capacity To Ship Packages Within D DaysMedium
37.5%
1529Minimum Suffix FlipsMedium
37.5%
1143Longest Common Subsequence
StringDP
Medium
37.5%
2439Minimize Maximum of Array
Array
Medium
37.5%
102Binary Tree Level Order Traversal
Tree
Medium
37.5%
212Word Search IIHard
37.5%
2583Kth Largest Sum in a Binary Tree
TreeHeap
Medium
37.5%
2771Longest Non-decreasing Subarray From Two Arrays
Array
Medium
37.5%
33Search in Rotated Sorted Array
ArrayBinary Search
Medium
37.5%
1930Unique Length-3 Palindromic Subsequences
String
Medium
37.5%