Skip to content

Add Jump Search image #552

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 3 commits into from
Oct 29, 2018
Merged
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -177,6 +177,7 @@ In interpolation-sequential search, interpolation is used to find an item near t
###### Source: [Wikipedia](https://en.wikipedia.org/wiki/Interpolation_search)

## Jump Search
![alt text][JumpSearch-image]
In computer science, a jump search or block search refers to a search algorithm for ordered lists. It works by first checking all items Lkm, where {\displaystyle k\in \mathbb {N} } k\in \mathbb {N} and m is the block size, until an item is found that is larger than the search key. To find the exact position of the search key in the list a linear search is performed on the sublist L[(k-1)m, km].

The optimal value of m is √n, where n is the length of the list L. Because both steps of the algorithm look at, at most, √n items the algorithm runs in O(√n) time. This is better than a linear search, but worse than a binary search. The advantage over the latter is that a jump search only needs to jump backwards once, while a binary can jump backwards up to log n times. This can be important if a jumping backwards takes significantly more time than jumping forward.
Expand Down Expand Up @@ -293,4 +294,6 @@ where {\displaystyle \oplus } \oplus denotes the exclusive disjunction (XOR) op

[ROT13-image]: https://upload.wikimedia.org/wikipedia/commons/3/33/ROT13_table_with_example.svg "ROT13"

[JumpSearch-image]: https://i1.wp.com/theoryofprogramming.com/wp-content/uploads/2016/11/jump-search-1.jpg "Jump Search"

[QuickSelect-image]: https://upload.wikimedia.org/wikipedia/commons/0/04/Selecting_quickselect_frames.gif "Quick Select"