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Curriculum

Lessons grouped by level. Open any topic to read it; completing one unlocks what depends on it.

See it as a map

Start herePython BasicsFoundation, about 40 minOpen lesson

Foundation

Python BasicsUp next40 minFull lesson
Lists & TuplesAvailable35 minFull lesson
Sets & DictionariesAvailable40 minFull lesson
Built-ins, Classes & IteratorsAvailable40 minFull lesson
Best Coding PracticesAvailable35 minFull lesson
Time & Space ComplexityAvailable30 minFull lesson

Beginner

Arrays, Lists & MatricesAvailable35 minFull lesson
Sorting BasicsAvailable35 minFull lesson

Core

Prefix SumAvailable30 minFull lesson
Two PointersAvailable30 minFull lesson
Sliding WindowAvailable30 minFull lesson
Binary SearchAvailable35 minFull lesson
Recursion IAvailable35 minFull lesson
Sorting II (Merge, Quick, Bucket, Cyclic)Available50 minFull lesson
Numerics & MathAvailable45 minFull lesson

Intermediate

Linked ListsAvailable40 minFull lesson
Stacks, Queues & MonotonicityAvailable35 minFull lesson
Recursion II: Backtracking & Divide and ConquerAvailable50 minFull lesson
GreedyAvailable40 minFull lesson
Binary Trees & BSTsAvailable40 minFull lesson
HeapAvailable40 minFull lesson
GraphsAvailable40 minFull lesson
BFSAvailable35 minFull lesson
DFSAvailable35 minFull lesson
Topological SortAvailable40 minFull lesson
Union-Find (DSU)Available35 minFull lesson
Dynamic Programming: Top-DownAvailable40 minFull lesson
Dynamic Programming: Bottom-Up (Tabulation, Knapsack)Available55 minFull lesson

Advanced

Shortest Paths (Dijkstra, Bellman-Ford, Floyd-Warshall)Available55 minFull lesson
Minimum Spanning TreeAvailable45 minFull lesson
Segment TreeAvailable60 minFull lesson
Fenwick TreeAvailable45 minFull lesson
Sparse TableAvailable40 minFull lesson
Advanced DP (Bitmask, Digit, Tree DP)Available75 minFull lesson
Number Theory & CombinatoricsAvailable60 minFull lesson
String Algorithms (KMP, Z, Rolling Hash, Trie)Available65 minFull lesson
Bit ManipulationAvailable45 minFull lesson
Computational GeometryAvailable60 minFull lesson

Expert

Contest Strategy & Time ManagementAvailable50 minFull lesson
Upsolving & Pattern RecognitionAvailable45 minFull lesson

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