1All O`one Data StructureHardHash TableLinked ListDesign
Solve → 2Stock Price FluctuationMediumHash TableDesignHeap (Priority Queue)
Solve → 3All O`one Data StructureHardHash TableLinked ListDesign
Solve → 4Lowest Common Ancestor of a Binary Tree IVMediumHash TableTreeDepth-First Search
Solve → 5Logger Rate LimiterEasyHash TableDesignData Stream
Solve → 6Design File SystemMediumHash TableStringDesign
Solve → 7Longest Substring Without Repeating CharactersMediumHash TableStringSliding Window
Solve → 8Lowest Common Ancestor of a Binary Tree IIIMediumHash TableTwo PointersTree
Solve → 9LRU CacheMediumHash TableLinked ListDesign
Solve → 10Design Authentication ManagerMediumHash TableLinked ListDesign
Solve → 11Stock Price FluctuationMediumHash TableDesignHeap (Priority Queue)
Solve → 12All O`one Data StructureHardHash TableLinked ListDesign
Solve → 13Lowest Common Ancestor of a Binary Tree IVMediumHash TableTreeDepth-First Search
Solve → 14Logger Rate LimiterEasyHash TableDesignData Stream
Solve → 15Longest Substring Without Repeating CharactersMediumHash TableStringSliding Window
Solve → 16Design Authentication ManagerMediumHash TableLinked ListDesign
Solve → 17Design File SystemMediumHash TableStringDesign
Solve → 18Lowest Common Ancestor of a Binary Tree IIIMediumHash TableTwo PointersTree
Solve → 19LRU CacheMediumHash TableLinked ListDesign
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