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Zeta LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Minimum Operations to Write the Letter Y on a Grid	MEDIUM	62.5%	ArrayHash TableMatrixCounting
Task Scheduler	MEDIUM	75%	ArrayHash TableGreedySortingHeap (Priority Queue)Counting
Apply Operations to Make Two Strings Equal	MEDIUM	100%	StringDynamic Programming
IPO	HARD	75%	ArrayGreedySortingHeap (Priority Queue)
Next Greater Element II	MEDIUM	75%	ArrayStackMonotonic Stack
Reverse Nodes in k-Group	HARD	62.5%	Linked ListRecursion
Longest Substring Without Repeating Characters	MEDIUM	62.5%	Hash TableStringSliding Window
Interleaving String	MEDIUM	62.5%	StringDynamic Programming
Capacity To Ship Packages Within D Days	MEDIUM	75%	ArrayBinary Search
Trapping Rain Water	HARD	75%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Count Univalue Subtrees	MEDIUM	62.5%	TreeDepth-First SearchBinary Tree
Insert Delete GetRandom O(1)	MEDIUM	62.5%	ArrayHash TableMathDesignRandomized
Minimum Window Substring	HARD	75%	Hash TableStringSliding Window
Longest Valid Parentheses	HARD	62.5%	StringDynamic ProgrammingStack
Split Array Largest Sum	HARD	87.5%	ArrayBinary SearchDynamic ProgrammingGreedyPrefix Sum
Remove K Digits	MEDIUM	62.5%	StringStackGreedyMonotonic Stack
Maximal Rectangle	HARD	62.5%	ArrayDynamic ProgrammingStackMatrixMonotonic Stack
Palindrome Partitioning II	HARD	75%	StringDynamic Programming
Heaters	MEDIUM	62.5%	ArrayTwo PointersBinary SearchSorting
Remove Boxes	HARD	75%	ArrayDynamic ProgrammingMemoization

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