### Graph Topological Sorting - Build System Order Example

Graph Topological Sorting This is a well known problem in graph world…

May 08, 2019

This topic is one of the most common studied. When somebody started preparation of coding interviews. Sorting algorithms would in his top 2 topics. Even typical computer science graduate study sorting algorithms 3-4 times before they complete graduation.

- These are one of the most fundamental building block which helps in other complex algorithms.
- If you understand different tricks and basics around these algorithms, you can solve many-many more complex problems. Or, you can utilize the code somewhere.
- Most common techniques
**Divide and Conquer**, covers few sorting algorithms. Which gives you more understanding of**Divide and Conquer**algorithms. - In other computational algorithms, you must be using one of sorting algorithms either directly or indirectly.
- These are used in database queries

And, the list is endless.

There are lot of sorting algorithms available, if you search in wikipedia. But, you should consider reading few of them. In below section, I will mention the important ones.

There are lot of Sorting algorithms out there. I’ve categorized them as below:

Very basic ones. You should consider reading them at least once.

- Bubble Sort
- Selection Sort
- Insertion Sort (Important)

Below algorithms must be on your tips.

- Merge Sort
- Quick Sort
- Heap Sort

You should be familiar with these algorithms, although not much deep knowledge is required.

- Bucket Sort
- Counting Sort
- Radix Sort

Algorithms | Average(Expected) Running time | Worst Running time |
---|---|---|

Insert Sort | O(n^2) | O(n^2) |

Bubble Sort | O(n^2) | O(n^2) |

Selection Sort | O(n^2) | O(n^2) |

Quick Sort | O(n log n) | O(n^2) |

Merge Sort | O(n log n) | O(n log n) |

Heap Sort | O(n log n) | O(n log n) |

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