# dinesh2006-dudi/neetcode-submissions architecture

> Architecture diagram of the GitHub repository dinesh2006-dudi/neetcode-submissions, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-05). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/dinesh2006-dudi/neetcode-submissions
- Repository: https://github.com/dinesh2006-dudi/neetcode-submissions

## Overview

#### Purpose and Scope
This is a NeetCode GitHub Sync repository containing standalone C++ solutions to data-structure and algorithm interview problems. It is a solution archive, not an integrated application: no shared runtime, build system, service layer, or internal package boundaries are present.

#### Entry Points and Execution Model
Each `submission-0.cpp` is an independent problem submission and is the effective execution entry point when copied into NeetCode’s C++ judge environment. Examples:
- `Data Structures & Algorithms/two-integer-sum/submission-0.cpp`
- `Data Structures & Algorithms/valid-sudoku/submission-0.cpp`
- `Data Structures & Algorithms/string-encode-and-decode/submission-0.cpp`

The repository itself provides no executable dispatcher or unified command to run all solutions.

#### Organization Boundary
The primary architectural boundary is problem isolation. The top-level topic directory, `Data Structures & Algorithms/`, groups related exercises; each child folder represents one problem; each submission file represents a versioned answer. There are no indicated dependencies between problem folders.

Representative boundaries:
- `Data Structures & Algorithms/anagram-groups/submission-0.cpp`
- `Data Structures & Algorithms/longest-consecutive-sequence/submission-0.cpp`
- `Data Structures & Algorithms/products-of-array-discluding-self/submission-0.cpp`

#### Algorithm Families
Solutions span core interview-algorithm categories, each implemented locally within its problem submission:
- Hashing and frequency/set lookup: `duplicate-integer`, `is-anagram`, and `anagram-groups`.
- Two-pointer and ordered-array traversal: `two-integer-sum-ii` and `is-palindrome`.
- Array scans and prefix/suffix computation: `buy-and-sell-crypto` and `products-of-array-discluding-self`.
- Heap or frequency ranking: `top-k-elements-in-list`.
- Matrix/constraint validation: `valid-sudoku`.

#### Data and Control Flow
For a given problem, the external judge supplies inputs to the submission’s expected solution interface; local algorithm logic transforms them into the required output. State is in-memory and ephemeral: arrays, strings, hash maps/sets, and result collections. No data persists across submissions or between runs.

Encoding/decoding is a localized bidirectional transformation boundary in:
- `Data Structures & Algorithms/string-encode-and-decode/submission-0.cpp`

#### External Infrastructure
NeetCode.io is the upstream authoring and execution platform, while GitHub is the synchronized storage target. The README identifies NeetCode’s GitHub Sync as the publication mechanism; accepted or configured submissions are auto-committed or bulk-synced. No database, API client, cloud runtime, CI system, or external application service is represented in the file tree.

Main entry points: [`Data Structures & Algorithms/two-integer-sum/submission-0.cpp`](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/two-integer-sum/submission-0.cpp) (Two Integer Sum), [`Data Structures & Algorithms/valid-sudoku/submission-0.cpp`](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/valid-sudoku/submission-0.cpp) (Valid Sudoku), [`Data Structures & Algorithms/string-encode-and-decode/submission-0.cpp`](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/string-encode-and-decode/submission-0.cpp) (String Encode and Decode), [`Data Structures & Algorithms/anagram-groups/submission-0.cpp`](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/anagram-groups/submission-0.cpp) (Anagram Groups)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_platform["External Platform"]
  node_neetcode{{"NeetCode.io<br/>authoring and judge"}}
  node_github{{"GitHub Sync<br/>publication mechanism"}}
end

subgraph group_archive["GitHub Solution Archive"]
  node_repository[("Solution repository<br/>GitHub archive")]
  node_topic["Data Structures &amp; Algorithms<br/>topic directory"]
  node_two_sum["Two Integer Sum<br/>standalone C++ submission<br/>[submission-0.cpp]"]
  node_valid_sudoku["Valid Sudoku<br/>matrix validation submission<br/>[submission-0.cpp]"]
  node_string_codec["String Encode and Decode<br/>bidirectional transform submission<br/>[submission-0.cpp]"]
  node_anagram_groups["Anagram Groups<br/>hashing submission<br/>[submission-0.cpp]"]
  node_longest_consecutive["Longest Consecutive Sequence<br/>set lookup submission<br/>[submission-0.cpp]"]
  node_product_except_self["Products Except Self<br/>prefix/suffix submission<br/>[submission-0.cpp]"]
  node_two_sum_ii["Two Integer Sum II<br/>two-pointer submission<br/>[submission-0.cpp]"]
  node_palindrome["Is Palindrome<br/>two-pointer submission<br/>[submission-0.cpp]"]
  node_crypto["Buy and Sell Crypto<br/>array scan submission<br/>[submission-0.cpp]"]
  node_top_k["Top K Elements<br/>heap/frequency submission<br/>[submission-0.cpp]"]
end

node_neetcode -->|"syncs submissions"| node_github
node_github -->|"publishes"| node_repository
node_repository -->|"contains"| node_topic
node_topic -->|"isolated problem"| node_two_sum
node_topic -->|"isolated problem"| node_valid_sudoku
node_topic -->|"isolated problem"| node_string_codec
node_topic -->|"isolated problem"| node_anagram_groups
node_topic -->|"isolated problem"| node_longest_consecutive
node_topic -->|"isolated problem"| node_product_except_self
node_topic -->|"isolated problem"| node_two_sum_ii
node_topic -->|"isolated problem"| node_palindrome
node_topic -->|"isolated problem"| node_crypto
node_topic -->|"isolated problem"| node_top_k
node_neetcode -.->|"judge input/output"| node_two_sum
node_neetcode -.->|"judge input/output"| node_valid_sudoku
node_neetcode -.->|"judge input/output"| node_string_codec

click node_two_sum "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/two-integer-sum/submission-0.cpp"
click node_valid_sudoku "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/valid-sudoku/submission-0.cpp"
click node_string_codec "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/string-encode-and-decode/submission-0.cpp"
click node_anagram_groups "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/anagram-groups/submission-0.cpp"
click node_longest_consecutive "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/longest-consecutive-sequence/submission-0.cpp"
click node_product_except_self "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/products-of-array-discluding-self/submission-0.cpp"
click node_two_sum_ii "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/two-integer-sum-ii/submission-0.cpp"
click node_palindrome "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/is-palindrome/submission-0.cpp"
click node_crypto "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/buy-and-sell-crypto/submission-0.cpp"
click node_top_k "https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/top-k-elements-in-list/submission-0.cpp"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_neetcode,node_github toneBlue
class node_repository,node_topic,node_two_sum,node_valid_sudoku,node_string_codec,node_anagram_groups,node_longest_consecutive,node_product_except_self,node_two_sum_ii,node_palindrome,node_crypto,node_top_k toneAmber
```

## Components

### External Platform

- **NeetCode.io**: authoring and judge · Supplies problem inputs and hosts C++ solution execution.
- **GitHub Sync**: publication mechanism · Synchronizes accepted or configured submissions to the repository.

### GitHub Solution Archive

Problem folders are isolated; submissions have no shared runtime or dependencies.

- **Solution repository**: GitHub archive · Stores standalone NeetCode C++ submissions.
- **Data Structures & Algorithms**: topic directory
- [Two Integer Sum](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/two-integer-sum/submission-0.cpp): standalone C++ submission · `Data Structures & Algorithms/two-integer-sum/submission-0.cpp`
- [Valid Sudoku](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/valid-sudoku/submission-0.cpp): matrix validation submission · `Data Structures & Algorithms/valid-sudoku/submission-0.cpp`
- [String Encode and Decode](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/string-encode-and-decode/submission-0.cpp): bidirectional transform submission · Locally encodes and decodes strings in memory. · `Data Structures & Algorithms/string-encode-and-decode/submission-0.cpp`
- [Anagram Groups](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/anagram-groups/submission-0.cpp): hashing submission · `Data Structures & Algorithms/anagram-groups/submission-0.cpp`
- [Longest Consecutive Sequence](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/longest-consecutive-sequence/submission-0.cpp): set lookup submission · `Data Structures & Algorithms/longest-consecutive-sequence/submission-0.cpp`
- [Products Except Self](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/products-of-array-discluding-self/submission-0.cpp): prefix/suffix submission · `Data Structures & Algorithms/products-of-array-discluding-self/submission-0.cpp`
- [Two Integer Sum II](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/two-integer-sum-ii/submission-0.cpp): two-pointer submission · `Data Structures & Algorithms/two-integer-sum-ii/submission-0.cpp`
- [Is Palindrome](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/is-palindrome/submission-0.cpp): two-pointer submission · `Data Structures & Algorithms/is-palindrome/submission-0.cpp`
- [Buy and Sell Crypto](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/buy-and-sell-crypto/submission-0.cpp): array scan submission · `Data Structures & Algorithms/buy-and-sell-crypto/submission-0.cpp`
- [Top K Elements](https://github.com/dinesh2006-dudi/neetcode-submissions/blob/main/Data%20Structures%20%26%20Algorithms/top-k-elements-in-list/submission-0.cpp): heap/frequency submission · `Data Structures & Algorithms/top-k-elements-in-list/submission-0.cpp`

## Connections

- NeetCode.io → GitHub Sync: syncs submissions
- GitHub Sync → Solution repository: publishes
- Solution repository → Data Structures & Algorithms: contains
- Data Structures & Algorithms → Two Integer Sum: isolated problem
- Data Structures & Algorithms → Valid Sudoku: isolated problem
- Data Structures & Algorithms → String Encode and Decode: isolated problem
- Data Structures & Algorithms → Anagram Groups: isolated problem
- Data Structures & Algorithms → Longest Consecutive Sequence: isolated problem
- Data Structures & Algorithms → Products Except Self: isolated problem
- Data Structures & Algorithms → Two Integer Sum II: isolated problem
- Data Structures & Algorithms → Is Palindrome: isolated problem
- Data Structures & Algorithms → Buy and Sell Crypto: isolated problem
- Data Structures & Algorithms → Top K Elements: isolated problem
- NeetCode.io → Two Integer Sum: judge input/output
- NeetCode.io → Valid Sudoku: judge input/output
- NeetCode.io → String Encode and Decode: judge input/output