# CLRS.Helper Lite — A tool  for studying CLRS

> A tool  for studying CLRS (iPhone/iPad app by 巍 顾.)

- Source: https://appshunter.io/ios/app/clrshelperlite/id1566475953 (this page in markdown: same URL + `.md`)
- Developer: [巍 顾](https://appshunter.io/developer/1368599824)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 27 MB
- Languages: English, Chinese, Chinese
- Released: 2021-05-07
- Data updated: 2026-06-11
- User reviews in markdown: https://appshunter.io/ios/app/clrshelperlite/id1566475953/reviews.md

## What is CLRS.Helper[Lite]?

Refer to The third edition of the book, covering content [need full version]:
    2. Getting Started: Insertion sort, Merge sort;
    4. Divide-and-Conquer: Maximum-subarray, Matrix Multiplication[normal, recursive, Strassen’s algorithm];
    6. Heapsort: Heapsort[max-heap, min-heap];
    7. Quicksort: Quicksort;
    8. Sorting in Linear Time: Counting sort;
    12. Binary Search Trees: Binary search tree[Inorder Walk, Search Recursive, Search Iterative, Minimum Iterative, Maximum Iterative, Successor, Predecessor, Insert, Delete];
    13. Red-Black Trees: Red Black Tree[Insert, Delete];
    15. Dynamic Programming: Rod cutting[Recursive, Top_down, Bottom_up, Print],Longest common subsequence;
    16. Greedy Algorithms: Acitivity selection[Recursive, Iterative],Huffman codes;
    22. Elementary Graph: Breadth-first search, Depth-first search, Topological sort, Strongly connected components;
    23. Minimum Spanning Trees: Minimum spanning tree[Kruskal’s algorithm，Prim’s algorithm];
    24. Single-Source Shortest Paths: The Bellman-Ford algorithm，DAG algorithm，Dijkstra’s algorithm;
    25. All-pairs Shortest Paths: All-pairs Shortest paths algorithms[Slow，Faster，The Floyd-Warshall algorithm];
    26. Maximum Flow: The Ford-Fulkerson algorithm;
    Addition: Tower of Hanoi，N Queens Problem，Comparison of sorting algorithms;

The primary features:
    You can run the pseudo-code single step or continuous, observe the change of parameters and data structures，it can help you to understand the design thought of the algorithm;
    You can set breakpoints in program and ovserve the status of breakpoint, it can help you to understand why this algorithm is corrcet by using loop invariants;
    With running-time function stacks and the returning positions，you can track the running process of recursive functions easily, and understand the operation mechanism of computer programs;
    By recording the performed times of the pseudo-codes can help you to understand the running time of algorithms;

I wish this app can be helpful to you;


## Version history (last 5 releases)

### 1.5 — 2022-06-27

Added: descriptions of Insert Sort and Merge Sort in Ch02;

### 1.4 — 2022-02-19

Improved: simplify operations;

### 1.3 — 2021-12-05

Improved: Support to set breakpoints in programs;

### 1.2 — 2021-06-24

Added: Ch22-Topological sort & Strongly connected components;

### 1.1 — 2021-05-18

Fixed: some input issues;

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## More apps by 巍 顾

- [PE.Mech](https://appshunter.io/ios/app/pemech/id1368599825)
- [PE.Mech Lite](https://appshunter.io/ios/app/pemechlite/id1455308553)
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All apps by 巍 顾: https://appshunter.io/developer/1368599824

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