1Tweet Counts Per FrequencyMediumHash TableStringBinary Search
Solve → 2LRU CacheMediumHash TableLinked ListDesign
Solve → 3Implement Trie (Prefix Tree)MediumHash TableStringDesign
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Solve → 5Integer to RomanMediumHash TableMathString
Solve → 6Minimum Genetic MutationMediumHash TableStringBreadth-First Search
Solve → 7Minimum Number of Steps to Make Two Strings AnagramMediumHash TableStringCounting
Solve → 8Happy NumberEasyHash TableMathTwo Pointers
Solve → 9Design Authentication ManagerMediumHash TableLinked ListDesign
Solve → 10LRU CacheMediumHash TableLinked ListDesign
Solve → 11Tweet Counts Per FrequencyMediumHash TableStringBinary Search
Solve → 12Integer to RomanMediumHash TableMathString
Solve → 13Happy NumberEasyHash TableMathTwo Pointers
Solve → 14Implement Trie (Prefix Tree)MediumHash TableStringDesign
Solve → 15Design TwitterMediumHash TableLinked ListDesign
Solve → 16Minimum Genetic MutationMediumHash TableStringBreadth-First Search
Solve → 17Minimum Number of Steps to Make Two Strings AnagramMediumHash TableStringCounting
Solve → 18Design Authentication ManagerMediumHash TableLinked ListDesign
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