Skip to main content
DifficultyTopic45 of 45
No.ProblemDifficultyFrequency
121Best Time to Buy and Sell StockEasy
100.0%
1200Minimum Absolute DifferenceEasy
100.0%
1921Eliminate Maximum Number of Monsters
Math
Medium
100.0%
1011Capacity To Ship Packages Within D DaysMedium
87.5%
3178Find the Child Who Has the Ball After K SecondsEasy
87.5%
739Daily TemperaturesMedium
87.5%
726Number of Atoms
Math
Hard
87.5%
3Longest Substring Without Repeating Characters
StringTree
Medium
75.0%
153SumMedium
75.0%
394Decode String
String
Medium
75.0%
63Unique Paths IIMedium
75.0%
3787Find Diameter Endpoints of a Tree
DPTree
Medium
75.0%
1209Remove All Adjacent Duplicates in String II
String
Medium
75.0%
198House RobberMedium
62.5%
1636Sort Array by Increasing Frequency
Array
Easy
62.5%
844Backspace String Compare
String
Easy
62.5%
724Find Pivot IndexEasy
62.5%
70Climbing StairsEasy
62.5%
239Sliding Window Maximum
Sliding Window
Hard
62.5%
322Coin Change
DP
Medium
62.5%
560Subarray Sum Equals K
Array
Medium
62.5%
1331Rank Transform of an Array
Array
Easy
62.5%
75Sort ColorsMedium
62.5%
875Koko Eating BananasMedium
62.5%
78SubsetsMedium
62.5%
20Valid Parentheses
Stack/Queue
Easy
50.0%
120TriangleMedium
50.0%
2734Lexicographically Smallest String After Substring Operation
StringTreeGraph
Medium
50.0%
1190Reverse Substrings Between Each Pair of Parentheses
StringTree
Medium
50.0%
380Insert Delete GetRandom O(1)Medium
50.0%
12Integer to Roman
Math
Medium
50.0%
496Next Greater Element IEasy
50.0%
1283Find the Smallest Divisor Given a ThresholdMedium
50.0%
977Squares of a Sorted Array
Array
Easy
50.0%
1Two Sum
Sliding Window
Easy
50.0%
713Subarray Product Less Than K
Array
Medium
50.0%
46PermutationsMedium
50.0%
300Longest Increasing Subsequence
String
Medium
50.0%
412Fizz BuzzEasy
50.0%
1048Longest String Chain
String
Medium
50.0%
767Reorganize String
String
Medium
50.0%
202Happy Number
Math
Easy
50.0%
122Best Time to Buy and Sell Stock IIMedium
50.0%
55Jump GameMedium
50.0%
3893Maximum Team Size with Overlapping IntervalsMedium
50.0%