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Epam Systems LeetCode Questions 2026

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

Last updated: 10 July 2026

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Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	100%	ArrayHash Table
Add Two Numbers	MEDIUM	50%	Linked ListMathRecursion
Longest Substring Without Repeating Characters	MEDIUM	100%	Hash TableStringSliding Window
Longest Palindromic Substring	MEDIUM	87.5%	Two PointersStringDynamic Programming
Palindrome Number	EASY	50%	Math
3Sum	MEDIUM	62.5%	ArrayTwo PointersSorting
Valid Parentheses	EASY	87.5%	StringStack
Trapping Rain Water	HARD	62.5%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Group Anagrams	MEDIUM	75%	ArrayHash TableStringSorting
Merge Sorted Array	EASY	75%	ArrayTwo PointersSorting
Minimum Operations to Make a Uni-Value Grid	MEDIUM	100%	ArrayMathSortingMatrix
Best Time to Buy and Sell Stock	EASY	75%	ArrayDynamic Programming
Valid Anagram	EASY	75%	Hash TableStringSorting
House Robber	MEDIUM	62.5%	ArrayDynamic Programming
Partition Equal Subset Sum	MEDIUM	62.5%	ArrayDynamic Programming
Longest Common Prefix	EASY	87.5%	ArrayStringTrie
Maximum Difference Between Node and Ancestor	MEDIUM	50%	TreeDepth-First SearchBinary Tree
Reverse Integer	MEDIUM	50%	Math
Longest Consecutive Sequence	MEDIUM	62.5%	ArrayHash TableUnion-Find
String Compression	MEDIUM	62.5%	Two PointersString

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