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DifficultyTopic63 of 63
No.ProblemDifficultyFrequency
146LRU CacheMedium
100.0%
1997First Day Where You Have Been in All the RoomsMedium
87.5%
316Remove Duplicate LettersMedium
87.5%
1081Smallest Subsequence of Distinct Characters
String
Medium
87.5%
39Combination SumMedium
75.0%
56Merge IntervalsMedium
75.0%
200Number of Islands
GraphMath
Medium
75.0%
207Course ScheduleMedium
75.0%
227Basic Calculator IIMedium
75.0%
221Maximal SquareMedium
75.0%
934Shortest BridgeMedium
75.0%
33Search in Rotated Sorted Array
ArrayBinary Search
Medium
62.5%
42Trapping Rain WaterHard
62.5%
198House RobberMedium
62.5%
394Decode String
String
Medium
62.5%
1Two Sum
Sliding Window
Easy
62.5%
40Combination Sum IIMedium
62.5%
347Top K Frequent Elements
Heap
Medium
62.5%
994Rotting OrangesMedium
62.5%
1143Longest Common Subsequence
StringDP
Medium
62.5%
10Regular Expression MatchingHard
62.5%
121Best Time to Buy and Sell StockEasy
62.5%
2Add Two Numbers
Math
Medium
62.5%
224Basic CalculatorHard
62.5%
2502Design Memory AllocatorMedium
62.5%
662Maximum Width of Binary Tree
Tree
Medium
62.5%
43Multiply Strings
String
Medium
62.5%
53Maximum Subarray
Array
Medium
62.5%
721Accounts MergeMedium
62.5%
127Word LadderHard
62.5%
93Restore IP AddressesMedium
62.5%
300Longest Increasing Subsequence
String
Medium
62.5%
148Sort ListMedium
50.0%
215Kth Largest Element in an Array
ArrayHeap
Medium
50.0%
317Shortest Distance from All BuildingsHard
50.0%
1530Number of Good Leaf Nodes Pairs
Linked ListMath
Medium
50.0%
70Climbing StairsEasy
50.0%
380Insert Delete GetRandom O(1)Medium
50.0%
939Minimum Area RectangleMedium
50.0%
407Trapping Rain Water IIHard
50.0%
560Subarray Sum Equals K
Array
Medium
50.0%
78SubsetsMedium
50.0%
424Longest Repeating Character ReplacementMedium
50.0%
1171Remove Zero Sum Consecutive Nodes from Linked List
Linked List
Medium
50.0%
402Remove K Digits
Math
Medium
50.0%
133Clone Graph
Graph
Medium
50.0%
92Reverse Linked List II
Linked List
Medium
50.0%
5Longest Palindromic Substring
StringTree
Medium
50.0%
2134Minimum Swaps to Group All 1's Together IIMedium
50.0%
162Find Peak Element
Binary Search
Medium
50.0%
20Valid Parentheses
Stack/Queue
Easy
50.0%
3043Find the Length of the Longest Common Prefix
DP
Medium
50.0%
1352Product of the Last K Numbers
Math
Medium
50.0%
55Jump GameMedium
50.0%
23Merge k Sorted ListsHard
50.0%
68Text JustificationHard
50.0%
450Delete Node in a BST
TreeLinked List
Medium
50.0%
103Binary Tree Zigzag Level Order Traversal
Tree
Medium
50.0%
540Single Element in a Sorted Array
Array
Medium
50.0%
163Sum ClosestMedium
50.0%
142Linked List Cycle II
GraphLinked List
Medium
50.0%
239Sliding Window Maximum
Sliding Window
Hard
50.0%
62Unique PathsMedium
50.0%