CONCEPT BLOGS
Deep concept tutorials — written the way we teach Multi-phase guides with mental models, worked examples, diagrams, and real edge cases — the public form of Learnisim AI's conceptual learning. Read here; train it interactively in the app.
HOW WE TEACH · SAME ARC AS THE APP
Why → Model → Worked → Practice → Edge cases → Apply
LEVEL All beginner intermediate advanced
TOPIC All advanced algorithm analysis algorithms amortized arrays backtracking beginner bfs binary search trees binary-tree binary-trees bst bucket coding-interview complexity analysis computer science cycle data structures data-structures deque dfs dp dsa floyd geometry graph graph-theory graphs greedy greedy algorithms hash map hash set hashmap heap in-place intermediate intervals interview prep interview-prep kadane leetcode linked list matrix mental model monotonic stack performance pointers prefix prefix sum problem-solving programming fundamentals queue recursion scheduling serialization simulation sliding window sorting stack streaming strings time complexity topo tree trees two pointers union-find worked example
advanced 8 min · Oct 3, 2026
Learn N-Queens (n = 4) by tracing how to place 4 queens on a 4×4 board. Understand state space trees and backtracking step by step.
dsa backtracking algorithms recursion problem-solving
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