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11 questions tracked10 with solutions

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Frequency scoreSorted highest → lowest frequency✓ Our Solution = we have a detailed walkthrough

Showing 11 of 11 questions

MediumInsert Delete GetRandom O(1)✓ Our Solution

100

ArrayHash TableMathDesign+1

MediumShortest Uncommon Substring in an Array✓ Our Solution

ArrayHash TableStringTrie

MediumGroup Anagrams✓ Our Solution

ArrayHash TableStringSorting

HardParse Lisp Expression✓ Our Solution

Hash TableStringStackRecursion

MediumDesign Hit Counter

ArrayBinary SearchDesignQueue+1

HardInsert Delete GetRandom O(1) - Duplicates allowed✓ Our Solution

ArrayHash TableMathDesign+1

MediumString Compression✓ Our Solution

Two PointersString

EasyValid Anagram✓ Our Solution

Hash TableStringSorting

MediumCoin Change✓ Our Solution

ArrayDynamic ProgrammingBreadth-First Search

MediumString Compression III✓ Our Solution

String

EasyNumber of Recent Calls✓ Our Solution

DesignQueueData Stream