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DifficultyTopic14 of 14
No.ProblemDifficultyFrequency
346Moving Average from Data StreamEasy
100.0%
3Longest Substring Without Repeating Characters
StringTree
Medium
87.5%
1152Analyze User Website Visit PatternMedium
87.5%
215Kth Largest Element in an Array
ArrayHeap
Medium
87.5%
1Two Sum
Sliding Window
Easy
75.0%
1917Leetcodify Friends RecommendationsHard
75.0%
1919Leetcodify Similar FriendsHard
75.0%
20Valid Parentheses
Stack/Queue
Easy
75.0%
383Ransom NoteEasy
62.5%
480Sliding Window Median
Sliding WindowHeap
Hard
62.5%
509Fibonacci Number
DPMath
Easy
62.5%
295Find Median from Data Stream
Heap
Hard
62.5%
104Maximum Depth of Binary Tree
Tree
Easy
50.0%
125Valid Palindrome
String
Easy
50.0%