1LRU CacheMediumHash TableLinked ListDesign
Solve → 2Longest Substring Without Repeating CharactersMediumHash TableStringSliding Window
Solve → 3LRU CacheMediumHash TableLinked ListDesign
Solve → 4Longest Substring Without Repeating CharactersMediumHash TableStringSliding Window
Solve → 5Valid AnagramEasyHash TableStringSorting
Solve → 6Copy List with Random PointerMediumHash TableLinked List
Solve → 7Count the Number of Good SubsequencesMediumHash TableMathString
Solve → 8Linked List CycleEasyHash TableLinked ListTwo Pointers
Solve → 9Clone GraphMediumHash TableDepth-First SearchBreadth-First Search
Solve → 10First Unique Character in a StringEasyHash TableStringQueue
Solve → 11LRU CacheMediumHash TableLinked ListDesign
Solve → 12Longest Substring Without Repeating CharactersMediumHash TableStringSliding Window
Solve → 13Copy List with Random PointerMediumHash TableLinked List
Solve → 14Valid AnagramEasyHash TableStringSorting
Solve → 15Count the Number of Good SubsequencesMediumHash TableMathString
Solve → 16Linked List CycleEasyHash TableLinked ListTwo Pointers
Solve → 17First Unique Character in a StringEasyHash TableStringQueue
Solve → 18Clone GraphMediumHash TableDepth-First SearchBreadth-First Search
Solve → 19Word PatternEasyHash TableString
Solve → 20All Nodes Distance K in Binary TreeMediumHash TableTreeDepth-First Search
Solve →