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DifficultyTopic42 of 42
No.ProblemDifficultyFrequency
56Merge IntervalsMedium
100.0%
121Best Time to Buy and Sell StockEasy
87.5%
200Number of Islands
GraphMath
Medium
87.5%
227Basic Calculator IIMedium
87.5%
767Reorganize String
String
Medium
87.5%
1729Find Followers CountEasy
87.5%
622Design Circular Queue
Stack/Queue
Medium
87.5%
1758Minimum Changes To Make Alternating Binary String
String
Easy
87.5%
1117Building H2OMedium
87.5%
3Longest Substring Without Repeating Characters
StringTree
Medium
75.0%
17Letter Combinations of a Phone Number
Math
Medium
75.0%
153SumMedium
75.0%
20Valid Parentheses
Stack/Queue
Easy
75.0%
146LRU CacheMedium
75.0%
42Trapping Rain WaterHard
75.0%
1Two Sum
Sliding Window
Easy
75.0%
223Rectangle AreaMedium
75.0%
347Top K Frequent Elements
Heap
Medium
62.5%
53Maximum Subarray
Array
Medium
62.5%
934Shortest BridgeMedium
62.5%
393UTF-8 ValidationMedium
62.5%
399Evaluate DivisionMedium
62.5%
127Word LadderHard
62.5%
909Snakes and LaddersMedium
62.5%
11Container With Most WaterMedium
50.0%
348Design Tic-Tac-ToeMedium
50.0%
242Valid Anagram
String
Easy
50.0%
41First Missing PositiveHard
50.0%
128Longest Consecutive SequenceMedium
50.0%
207Course ScheduleMedium
50.0%
48Rotate ImageMedium
50.0%
150Evaluate Reverse Polish NotationMedium
50.0%
202Happy Number
Math
Easy
50.0%
1603Design Parking SystemEasy
50.0%
126Word Ladder IIHard
50.0%
2502Design Memory AllocatorMedium
50.0%
2115Find All Possible Recipes from Given SuppliesMedium
50.0%
4Median of Two Sorted Arrays
ArrayHeap
Hard
50.0%
392Is Subsequence
String
Easy
50.0%
341Flatten Nested List IteratorMedium
50.0%
359Logger Rate LimiterEasy
50.0%
224Basic CalculatorHard
50.0%