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HRT LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Add Edges to Make Degrees of All Nodes Even	HARD	100%	Hash TableGraph Theory
Longest Path With Different Adjacent Characters	HARD	100%	ArrayStringTreeDepth-First SearchGraph TheoryTopological Sort
Maximum Total Importance of Roads	MEDIUM	100%	GreedyGraph TheorySortingHeap (Priority Queue)
Detect Pattern of Length M Repeated K or More Times	EASY	100%	ArrayEnumeration
Convert Integer to the Sum of Two No-Zero Integers	EASY	100%	Math
Number of Steps to Reduce a Number to Zero	EASY	100%	MathBit Manipulation
Maximum 69 Number	EASY	100%	MathGreedy
Maximum Score From Grid Operations	HARD	100%	ArrayDynamic ProgrammingMatrixPrefix Sum

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