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Zopsmart LeetCode Questions 2026

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

Last updated: 10 July 2026

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Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Zigzag Conversion	MEDIUM	100%	String
Reverse Nodes in Even Length Groups	MEDIUM	75%	Linked List
Trapping Rain Water	HARD	87.5%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Fraction Addition and Subtraction	MEDIUM	50%	MathStringSimulation
Container With Most Water	MEDIUM	50%	ArrayTwo PointersGreedy
Remove K Digits	MEDIUM	62.5%	StringStackGreedyMonotonic Stack
Bulls and Cows	MEDIUM	62.5%	Hash TableStringCounting
Letter Combinations of a Phone Number	MEDIUM	50%	Hash TableStringBacktracking
Reverse Words in a String	MEDIUM	62.5%	Two PointersString
Longest Palindromic Substring	MEDIUM	50%	Two PointersStringDynamic Programming
Hexadecimal and Hexatrigesimal Conversion	EASY	75%	MathString
Valid Anagram	EASY	50%	Hash TableStringSorting
Broken Calculator	MEDIUM	50%	MathGreedy
Decode String	MEDIUM	87.5%	StringStackRecursion
Restore IP Addresses	MEDIUM	50%	StringBacktracking
Reverse Nodes in k-Group	HARD	50%	Linked ListRecursion

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