SWE Interview Playbook
Learn the 16 coding-interview patterns — visually
Most interview problems are variations of a small set of techniques. Study the patterns, watch the algorithms run step by step, and drill the exact tested solutions.
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Interactive Study Guide
All 16 patterns with recognition triggers, animated "how it works" panels, difficulty filters, dark mode, progress tracking, and expandable drills revealing the exact tested solution code.
Open the study guide → ▶️Algorithm Visualizer
Pick a pattern and press Play — or step through with the arrow keys — to watch sliding windows slide, pointers converge, heaps rebalance, DP tables fill, and topological orders emerge. Covers all 16 patterns.
Open the visualizer →The patterns
Sliding WindowTwo PointersFast & Slow PointersMerge IntervalsCyclic SortLinkedList ReversalTree BFSTree DFSTwo HeapsSubsetsModified Binary SearchBitwise XORTop K ElementsK-way Merge0/1 KnapsackTopological Sort