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DifficultyTopic12 of 12
No.ProblemDifficultyFrequency
323Number of Connected Components in an Undirected Graph
GraphMath
Medium
100.0%
64Minimum Path SumMedium
62.5%
1570Dot Product of Two Sparse VectorsMedium
62.5%
208Implement Trie (Prefix Tree)
Tree
Medium
62.5%
1404Number of Steps to Reduce a Number in Binary Representation to One
Math
Medium
62.5%
689Maximum Sum of 3 Non-Overlapping Subarrays
Array
Hard
62.5%
146LRU CacheMedium
50.0%
41First Missing PositiveHard
50.0%
1637Widest Vertical Area Between Two Points Containing No PointsEasy
50.0%
297Serialize and Deserialize Binary Tree
Tree
Hard
50.0%
843Guess the WordHard
50.0%
1647Minimum Deletions to Make Character Frequencies UniqueMedium
50.0%