R

Roblox

53 questions tracked48 with solutions
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Frequency scoreSorted highest β†’ lowest frequencyβœ“ Our Solution = we have a detailed walkthrough

Showing 53 of 53 questions

1
MediumReorganize Stringβœ“ Our Solution
100
Hash TableStringGreedySorting+2
2
MediumDesign Browser Historyβœ“ Our Solution
86
ArrayLinked ListStackDesign+2
3
MediumTask Schedulerβœ“ Our Solution
85
ArrayHash TableGreedySorting+2
4
MediumDesign Hit Counter
82
ArrayBinary SearchDesignQueue+1
5
MediumMaximize Distance to Closest Personβœ“ Our Solution
82
Array
6
MediumMerge Intervalsβœ“ Our Solution
75
ArraySorting
7
HardText Justificationβœ“ Our Solution
74
ArrayStringSimulation
8
EasyConvert Binary Number in a Linked List to Integerβœ“ Our Solution
70
Linked ListMath
9
EasyStudents and Examinationsβœ“ Our Solution
70
Database
10
MediumNumber of Trusted Contacts of a Customer
70
Database
11
MediumGroup the People Given the Group Size They Belong Toβœ“ Our Solution
70
ArrayHash TableGreedy
12
MediumCount Number of Nice Subarraysβœ“ Our Solution
70
ArrayHash TableMathSliding Window+1
13
MediumSubdomain Visit Countβœ“ Our Solution
70
ArrayHash TableStringCounting
14
MediumMaximum Number of Occurrences of a Substringβœ“ Our Solution
70
Hash TableStringSliding Window
15
MediumMagnetic Force Between Two Ballsβœ“ Our Solution
70
ArrayBinary SearchSorting
16
EasyValid Parenthesesβœ“ Our Solution
68
StringStack
17
HardInteger to English Wordsβœ“ Our Solution
68
MathStringRecursion
18
MediumImplement Trie (Prefix Tree)βœ“ Our Solution
63
Hash TableStringDesignTrie
19
MediumRotate Imageβœ“ Our Solution
60
ArrayMathMatrix
20
HardNumber of Flowers in Full Bloomβœ“ Our Solution
56
ArrayHash TableBinary SearchSorting+2
21
MediumRotating the Boxβœ“ Our Solution
56
ArrayTwo PointersMatrix
22
MediumSpiral Matrixβœ“ Our Solution
52
ArrayMatrixSimulation
23
HardBlock Placement Queriesβœ“ Our Solution
52
ArrayBinary SearchBinary Indexed TreeSegment Tree
24
HardSplit Message Based on Limitβœ“ Our Solution
52
StringBinary SearchEnumeration
25
HardTrapping Rain Waterβœ“ Our Solution
52
ArrayTwo PointersDynamic ProgrammingStack+1
26
HardSubarrays with K Different Integersβœ“ Our Solution
46
ArrayHash TableSliding WindowCounting
27
MediumNumber of Adjacent Elements With the Same Colorβœ“ Our Solution
46
Array
28
EasyLongest Common Prefixβœ“ Our Solution
46
StringTrie
29
HardMinimum Falling Path Sum IIβœ“ Our Solution
46
ArrayDynamic ProgrammingMatrix
30
HardLargest Rectangle in Histogramβœ“ Our Solution
46
ArrayStackMonotonic Stack
31
MediumFind the Length of the Longest Common Prefixβœ“ Our Solution
46
ArrayHash TableStringTrie
32
HardFirst Missing Positiveβœ“ Our Solution
46
ArrayHash Table
33
MediumCandy Crush
38
ArrayTwo PointersMatrixSimulation
34
HardBasic Calculator IVβœ“ Our Solution
38
Hash TableMathStringStack+1
35
EasyNumber of Recent Callsβœ“ Our Solution
38
DesignQueueData Stream
36
MediumDiagonal Traverseβœ“ Our Solution
38
ArrayMatrixSimulation
37
MediumJump Game IIβœ“ Our Solution
38
ArrayDynamic ProgrammingGreedy
38
MediumLongest Consecutive Sequenceβœ“ Our Solution
38
ArrayHash TableUnion Find
39
EasyImage Smootherβœ“ Our Solution
38
ArrayMatrix
40
MediumLongest Substring Without Repeating Charactersβœ“ Our Solution
38
Hash TableStringSliding Window
41
EasyBest Time to Buy and Sell Stockβœ“ Our Solution
38
ArrayDynamic Programming
42
MediumSpiral Matrix IIβœ“ Our Solution
38
ArrayMatrixSimulation
43
MediumBrightest Position on Street
38
ArraySortingPrefix SumOrdered Set
44
MediumRotting Orangesβœ“ Our Solution
38
ArrayBreadth-First SearchMatrix
45
HardEmployee Free Time
38
ArrayLine SweepSortingHeap (Priority Queue)
46
38
ArrayHash Table
47
MediumMinimum Number of Frogs Croakingβœ“ Our Solution
38
StringCounting
48
MediumMinimum Absolute Difference Between Elements With Constraintβœ“ Our Solution
38
ArrayBinary SearchOrdered Set
49
HardWord Search IIβœ“ Our Solution
38
ArrayStringBacktrackingTrie+1
50
MediumAccounts Mergeβœ“ Our Solution
38
ArrayHash TableStringDepth-First Search+3
51
MediumRemove Colored Pieces if Both Neighbors are the Same Colorβœ“ Our Solution
38
MathStringGreedyGame Theory
52
MediumUnique Pathsβœ“ Our Solution
38
MathDynamic ProgrammingCombinatorics
53
MediumCourse Scheduleβœ“ Our Solution
38
Depth-First SearchBreadth-First SearchGraphTopological Sort