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Grammarly LeetCode Questions 2026

Browse LeetCode problems frequently asked by Grammarly. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Word Break	MEDIUM	50%	ArrayHash TableStringDynamic ProgrammingTrieMemoization
Word Break II	HARD	62.5%	ArrayHash TableStringDynamic ProgrammingBacktrackingTrieMemoization
Generate Parentheses	MEDIUM	75%	StringDynamic ProgrammingBacktracking
Remove All Adjacent Duplicates in String II	MEDIUM	87.5%	StringStack
Merge Intervals	MEDIUM	100%	ArraySorting
Repeated DNA Sequences	MEDIUM	75%	Hash TableStringBit ManipulationSliding WindowRolling HashHash Function
Climbing Stairs	EASY	75%	MathDynamic ProgrammingMemoization
Number of Islands	MEDIUM	50%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Word Search	MEDIUM	62.5%	ArrayStringBacktrackingDepth-First SearchMatrix
Remove All Adjacent Duplicates In String	EASY	87.5%	StringStack
Vowel Spellchecker	MEDIUM	87.5%	ArrayHash TableString
Perfect Number	EASY	75%	Math
Insert Delete GetRandom O(1)	MEDIUM	87.5%	ArrayHash TableMathDesignRandomized
Logger Rate Limiter	EASY	75%	Hash TableDesignData Stream
Search in Rotated Sorted Array	MEDIUM	87.5%	ArrayBinary Search
Sum of Left Leaves	EASY	62.5%	TreeDepth-First SearchBreadth-First SearchBinary Tree
Special Binary String	HARD	50%	StringDivide and ConquerSorting
Decode the Slanted Ciphertext	MEDIUM	50%	StringSimulation
Evaluate Reverse Polish Notation	MEDIUM	62.5%	ArrayMathStack
Implement Trie (Prefix Tree)	MEDIUM	50%	Hash TableStringDesignTrie

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