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Master Hash Maps & Sets with Adaptive AI.
Master Hash Maps & Sets across 16 patterns - Frequency & Counting, Set Membership & Lookup, Prefix Sum + Hash Map, Design & Advanced Hash - guided by Leyaa's adaptive intelligence.
4Parts
16Patterns
5hEst. duration
Hash Maps & Sets Course
4 parts
Frequency & Counting
5 patterns
Set Membership & Lookup
4 patterns
Prefix Sum + Hash Map
4 patterns
Design & Advanced Hash
3 patterns
✦ Course Structure
Hash Maps & Sets in 4 Parts
Work through the parts in order - each one builds on the last.
Part 1: Frequency & Counting
Covers First Unique Character in a String, Group Anagrams, Top K Frequent Elements and 2 more patterns.
5Patterns
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Part 2: Set Membership & Lookup
Covers Contains Duplicate, Happy Number, Intersection of Two Arrays II and 1 more pattern.
4Patterns
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Part 3: Prefix Sum + Hash Map
Covers Contiguous Array (Equal 0s and 1s), Continuous Subarray Sum and 2 more patterns.
4Patterns
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Part 4: Design & Advanced Hash
Covers Insert Delete GetRandom O(1), Isomorphic Strings, Time Based Key-Value Store.
3Patterns
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Curriculum
Everything You'll Learn
Explore every pattern in the course.
Hash Maps & Sets
4 parts · 16 patternsPart 1: Frequency & Counting5 patterns
MixedPart 2: Set Membership & Lookup4 patterns
MixedPart 3: Prefix Sum + Hash Map4 patterns
MixedPart 4: Design & Advanced Hash3 patterns
Mixed
Why LeyaaNot just a course. A learning intelligence.
Leyaa doesn't just deliver content - it understands where you are, what you need, and how to get you there fastest.
Adaptive Diagnostics
Leyaa identifies which of the 16 patterns you've mastered and which need work - before you waste time on what you already know.
Pattern-Level Precision
Every pattern gets a verdict - Learn, Practice, or Skip - so your study time goes exactly where it counts.
Intelligent Pacing
Leyaa reads your velocity across the whole course and adapts your focus list dynamically, keeping you in the optimal learning zone.
Before & After Visibility
Every assessment creates a snapshot. Retake anytime to see exactly how much you've grown - pattern by pattern.
Learner Autonomy
Leyaa recommends, never restricts. Override any suggestion and explore at your own pace - the system tracks everything regardless.
Clear Learning Path
Frequency & Counting → Set Membership & Lookup → Prefix Sum + Hash Map → Design & Advanced Hash - a structured journey where each part sets you up perfectly for the next.
Hash Maps & Sets
Ready to master Hash Maps & Sets?
Start your journey today
Start your diagnostic now. Build mastery across all 16 patterns in under 15 minutes.
16 Patterns
Personalized roadmap
