Browse LeetCode problems frequently asked by Udemy. 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
Median of Two Sorted Arrays
HARD
87.5%
ArrayBinary SearchDivide and Conquer
Valid Sudoku
MEDIUM
100%
ArrayHash TableMatrix
Valid Parentheses
EASY
87.5%
StringStack
Merge Two Sorted Lists
EASY
87.5%
Linked ListRecursion
Remove Duplicates from Sorted Array
EASY
100%
ArrayTwo Pointers
Fruits Into Baskets II
EASY
100%
ArrayBinary SearchSegment TreeSimulationOrdered Set
Encode and Decode Strings
MEDIUM
87.5%
ArrayStringDesign
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