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TikTok LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	75%	ArrayHash Table
Add Two Numbers	MEDIUM	37.5%	Linked ListMathRecursion
Longest Substring Without Repeating Characters	MEDIUM	87.5%	Hash TableStringSliding Window
Median of Two Sorted Arrays	HARD	37.5%	ArrayBinary SearchDivide and Conquer
Longest Palindromic Substring	MEDIUM	75%	Two PointersStringDynamic Programming
Regular Expression Matching	HARD	50%	StringDynamic ProgrammingRecursion
Container With Most Water	MEDIUM	50%	ArrayTwo PointersGreedy
Integer to Roman	MEDIUM	37.5%	Hash TableMathString
Longest Common Prefix	EASY	50%	ArrayStringTrie
3Sum	MEDIUM	75%	ArrayTwo PointersSorting
Valid Parentheses	EASY	62.5%	StringStack
Merge Two Sorted Lists	EASY	37.5%	Linked ListRecursion
Generate Parentheses	MEDIUM	62.5%	StringDynamic ProgrammingBacktracking
Merge k Sorted Lists	HARD	75%	Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Swap Nodes in Pairs	MEDIUM	37.5%	Linked ListRecursion
Reverse Nodes in k-Group	HARD	50%	Linked ListRecursion
Next Permutation	MEDIUM	37.5%	ArrayTwo Pointers
Longest Valid Parentheses	HARD	37.5%	StringDynamic ProgrammingStack
Search in Rotated Sorted Array	MEDIUM	75%	ArrayBinary Search
Find First and Last Position of Element in Sorted Array	MEDIUM	50%	ArrayBinary Search

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