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Coding BasicsAlgorithmsPattern Recognition
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0/ 111 problems solved

Foundations

0/41

Core data structures & array techniques

1
Hash Maps
0/6
2
Two Pointers
0/5
3
Sliding Window
0/6
4Prefix SumsPRO5Binary SearchPRO6Stacks & Monotonic StacksPRO7Linked ListsPRO8Matrix / 2D ArraysPRO

Intermediate

0/45

Trees, graphs, DP, and optimization

9Trees (DFS)PRO10Trees (BFS)PRO

Advanced

0/25

2D DP, advanced graphs, and specialized topics

17Dynamic Programming (2D)PRO18Advanced GraphsPRO
11
Heaps / Priority Queues
PRO
12Graphs (BFS/DFS)PRO
13BacktrackingPRO
14Dynamic Programming (1D)PRO
15GreedyPRO
16IntervalsPRO
19
Graph Shortest Path
PRO
20TriesPRO
21Design-Focused DSAPRO
22Bit ManipulationPRO