CodingInterviewAI logo

QUESTIONS BY COMPANY

Sigmoid LeetCode Questions 2026

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

Last updated: 20 Feb 2026

ProblemDifficultyFrequencyTopics
Binary Tree Zigzag Level Order TraversalMEDIUM
100%
TreeBreadth-First SearchBinary Tree
Product of Array Except SelfMEDIUM
75%
ArrayPrefix Sum
Reverse Nodes in k-GroupHARD
75%
Linked ListRecursion
Max Consecutive Ones IIIMEDIUM
75%
ArrayBinary SearchSliding WindowPrefix Sum
Boats to Save PeopleMEDIUM
75%
ArrayTwo PointersGreedySorting
Valid ParenthesesEASY
75%
StringStack
Longest Substring Without Repeating CharactersMEDIUM
75%
Hash TableStringSliding Window
Min StackMEDIUM
75%
StackDesign
Trapping Rain WaterHARD
75%
ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Best Time to Buy and Sell Stock IIMEDIUM
75%
ArrayDynamic ProgrammingGreedy
Best Time to Buy and Sell StockEASY
87.5%
ArrayDynamic Programming
Next Greater Element IIMEDIUM
75%
ArrayStackMonotonic Stack
Move ZeroesEASY
75%
ArrayTwo Pointers
Group AnagramsMEDIUM
75%
ArrayHash TableStringSorting

Need Help Solving These Problems?

CodingInterviewAI can instantly identify algorithms and generate optimal solutions for any LeetCode problem. Get step-by-step explanations and ace your next technical interview.

CodingInterviewAI logo

© 2026 CodingInterviewAI. All rights reserved

CodingInterviewAI

HomeBlogGive Feedback

Legal

Terms of UsePrivacy PolicyLegal Notice