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DifficultyTopic64 of 64
No.ProblemDifficultyFrequency
991Broken CalculatorMedium
100.0%
1003Check If Word Is Valid After Substitutions
Tree
Medium
100.0%
2895Minimum Processing TimeMedium
100.0%
1052Grumpy Bookstore OwnerMedium
100.0%
1156Swap For Longest Repeated Character Substring
StringTree
Medium
100.0%
1157Online Majority Element In Subarray
Array
Hard
100.0%
2428Maximum Sum of an HourglassMedium
100.0%
1559Detect Cycles in 2D Grid
GraphLinked List
Medium
100.0%
1687Delivering Boxes from Storage to PortsHard
100.0%
1689Partitioning Into Minimum Number Of Deci-Binary Numbers
DPMath
Medium
100.0%
853Car FleetMedium
100.0%
146LRU CacheMedium
87.5%
56Merge IntervalsMedium
87.5%
1290Convert Binary Number in a Linked List to Integer
Linked ListMath
Easy
87.5%
49Group Anagrams
String
Medium
75.0%
239Sliding Window Maximum
Sliding Window
Hard
75.0%
65Valid Number
Math
Hard
75.0%
334Increasing Triplet Subsequence
String
Medium
75.0%
48Rotate ImageMedium
75.0%
103Binary Tree Zigzag Level Order Traversal
Tree
Medium
62.5%
54Spiral Matrix
Array
Medium
62.5%
124Binary Tree Maximum Path Sum
Tree
Hard
62.5%
895Maximum Frequency Stack
Stack/Queue
Hard
62.5%
394Decode String
String
Medium
62.5%
74Search a 2D Matrix
Array
Medium
62.5%
33Search in Rotated Sorted Array
ArrayBinary Search
Medium
62.5%
92Reverse Linked List II
Linked List
Medium
62.5%
297Serialize and Deserialize Binary Tree
Tree
Hard
62.5%
716Max Stack
Stack/Queue
Hard
62.5%
329Longest Increasing Path in a Matrix
Array
Hard
62.5%
1014Best Sightseeing PairMedium
62.5%
621Task SchedulerMedium
62.5%
210Course Schedule IIMedium
62.5%
543Diameter of Binary Tree
Tree
Easy
62.5%
3Longest Substring Without Repeating Characters
StringTree
Medium
62.5%
41First Missing PositiveHard
50.0%
45Jump Game IIMedium
50.0%
417Pacific Atlantic Water FlowMedium
50.0%
545Boundary of Binary Tree
Tree
Medium
50.0%
347Top K Frequent Elements
Heap
Medium
50.0%
1584Min Cost to Connect All PointsMedium
50.0%
139Word BreakMedium
50.0%
200Number of Islands
GraphMath
Medium
50.0%
23Merge k Sorted ListsHard
50.0%
253Meeting Rooms IIMedium
50.0%
133Clone Graph
Graph
Medium
50.0%
130Surrounded RegionsMedium
50.0%
516Longest Palindromic Subsequence
String
Medium
50.0%
73Set Matrix Zeroes
Array
Medium
50.0%
42Trapping Rain WaterHard
50.0%
189Rotate Array
Array
Medium
50.0%
2712Minimum Cost to Make All Characters EqualMedium
50.0%
2127Maximum Employees to Be Invited to a MeetingHard
50.0%
1146Snapshot Array
Array
Medium
50.0%
1631Path With Minimum EffortMedium
50.0%
410Split Array Largest Sum
Array
Hard
50.0%
1004Max Consecutive Ones IIIMedium
50.0%
126Word Ladder IIHard
50.0%
2074Reverse Nodes in Even Length Groups
Linked List
Medium
50.0%
153SumMedium
50.0%
605Can Place FlowersEasy
50.0%
460LFU CacheHard
50.0%
968Binary Tree Cameras
Tree
Hard
50.0%
1823Find the Winner of the Circular GameMedium
50.0%