Browse LeetCode problems frequently asked by Maq Software. Filter by difficulty and timeframe to focus your interview prep.
Last updated: 20 Feb 2026
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30 days
3 months
6 months
More than 6 months
All
Easy
Medium
Hard
All
Problem
Difficulty
Frequency
Topics
Unique Substrings in Wraparound String
MEDIUM
100%
StringDynamic Programming
Longest Substring Without Repeating Characters
MEDIUM
75%
Hash TableStringSliding Window
Largest Rectangle in Histogram
HARD
62.5%
ArrayStackMonotonic Stack
Longest Palindromic Substring
MEDIUM
75%
Two PointersStringDynamic Programming
Second Highest Salary
MEDIUM
62.5%
Database
Longest Palindromic Subsequence
MEDIUM
62.5%
StringDynamic Programming
Best Time to Buy and Sell Stock
EASY
62.5%
ArrayDynamic Programming
Delete Duplicate Emails
EASY
62.5%
Database
Longest Valid Parentheses
HARD
62.5%
StringDynamic ProgrammingStack
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