# Overview

A topic-first, high-signal prep repo targeting Google SDE-3 (L5) in a 6-week sprint. Every file is dense and practical — no padding, no 500-problem lists. Navigate by topic, read deep, drill problems.

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## Directory Map

| Folder                | Purpose                                                                                                      | Start with                       |
| --------------------- | ------------------------------------------------------------------------------------------------------------ | -------------------------------- |
| `00-start-here/`      | Navigation hub, study schedule, 48-hr sprint, interview-day guide                                            | `00-start-here/README.md`        |
| `01-data-structures/` | 12 DS deep-dive files + index (arrays → segment trees)                                                       | `01-data-structures/README.md`   |
| `02-algorithms/`      | Algorithm deep-dives + standalone technique files (two pointers, sliding window, binary search, DP, graphs…) | `02-algorithms/README.md`        |
| `03-patterns/`        | Pattern recognition master, cheatsheets, revision guides, LC variants, system design                         | `03-patterns/patterns-master.md` |
| `04-behavioral/`      | Google's 4 attributes, STAR stories                                                                          | `04-behavioral/README.md`        |
| `05-revision/`        | Complexity table, Python gotchas, day-before checklist, coding rubric                                        | `05-revision/README.md`          |
| `books/`              | Algorithm design deep dives, CP3, DP book summaries                                                          | —                                |

***

## Quick Links

| What                        | Link                                                                                    |
| --------------------------- | --------------------------------------------------------------------------------------- |
| **Start here**              | [`00-start-here/README.md`](/coding/getting-started/00-start-here.md)                   |
| **Patterns master**         | [`03-patterns/patterns-master.md`](/coding/patterns-and-recognition/patterns-master.md) |
| **Cheatsheet + complexity** | [`05-revision/README.md`](/coding/revision/05-revision.md)                              |
| **Behavioral**              | [`04-behavioral/README.md`](/coding/behavioral/04-behavioral.md)                        |

***

## 4-Week Overview

| Week       | Focus                                                                    |
| ---------- | ------------------------------------------------------------------------ |
| **Week 1** | Arrays, Strings, Hashing, Linked Lists + Two Pointers, Sliding Window    |
| **Week 2** | Trees, BST, Graphs, BFS/DFS, Topological Sort                            |
| **Week 3** | DP (1D/2D/knapsack), Backtracking, Greedy, Recursion                     |
| **Week 4** | Binary Search, Heap, Tries, Behavioral                                   |
| **Week 5** | SDE-3 Hard Problems — full checklist from `05-revision/coding-rubric.md` |
| **Week 6** | Mocks (2/week), LLD round prep (`03-patterns/lld.md`), behavioral polish |

***

## If You Have N Days

Full schedule with daily breakdown: [`00-start-here/README.md`](/coding/getting-started/00-start-here.md)

| Time              | Strategy                                                               |
| ----------------- | ---------------------------------------------------------------------- |
| **28+ days**      | Follow the 4-week plan above, one major topic per day                  |
| **14 days**       | Compress to must-nail topics: Arrays, Trees, Graphs, DP, Binary Search |
| **7 days**        | Patterns master → top-K problems per pattern → behavioral              |
| **48 hours**      | See "48-hour sprint" section in `00-start-here/README.md`              |
| **Interview day** | See "Interview day" section in `00-start-here/README.md`               |


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