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DifficultyTopic41 of 41
No.ProblemDifficultyFrequency
1Two Sum
Sliding Window
Easy
100.0%
11Container With Most WaterMedium
87.5%
2065Maximum Path Quality of a Graph
Graph
Hard
87.5%
2954Count the Number of Infection Sequences
Math
Hard
87.5%
1349Maximum Students Taking ExamHard
87.5%
1341Movie RatingMedium
87.5%
2552Count Increasing QuadrupletsHard
87.5%
14Longest Common Prefix
DP
Easy
75.0%
20Valid Parentheses
Stack/Queue
Easy
75.0%
121Best Time to Buy and Sell StockEasy
75.0%
200Number of Islands
GraphMath
Medium
75.0%
53Maximum Subarray
Array
Medium
75.0%
5Longest Palindromic Substring
StringTree
Medium
75.0%
9Palindrome Number
StringMath
Easy
75.0%
56Merge IntervalsMedium
75.0%
206Reverse Linked List
Linked List
Easy
62.5%
215Kth Largest Element in an Array
ArrayHeap
Medium
62.5%
125Valid Palindrome
String
Easy
62.5%
146LRU CacheMedium
62.5%
1428Leftmost Column with at Least a OneMedium
62.5%
322Coin Change
DP
Medium
62.5%
49Group Anagrams
String
Medium
62.5%
283Move ZeroesEasy
62.5%
3Longest Substring Without Repeating Characters
StringTree
Medium
62.5%
141Linked List Cycle
GraphLinked List
Easy
62.5%
74Search a 2D Matrix
Array
Medium
62.5%
221Maximal SquareMedium
50.0%
367Valid Perfect SquareEasy
50.0%
42Trapping Rain WaterHard
50.0%
1038Binary Search Tree to Greater Sum Tree
TreeBinary Search
Medium
50.0%
135CandyHard
50.0%
100Same Tree
Tree
Easy
50.0%
33Search in Rotated Sorted Array
ArrayBinary Search
Medium
50.0%
204Count Primes
Math
Medium
50.0%
2Add Two Numbers
Math
Medium
50.0%
232Implement Queue using Stacks
Stack/Queue
Easy
50.0%
236Lowest Common Ancestor of a Binary Tree
Tree
Medium
50.0%
234Palindrome Linked List
StringLinked List
Easy
50.0%
383Ransom NoteEasy
50.0%
739Daily TemperaturesMedium
50.0%
76Minimum Window Substring
StringTreeSliding Window
Hard
50.0%