From 1963a59622b47971b903ed17895e29291ab1229b Mon Sep 17 00:00:00 2001 From: Shashank S Date: Sat, 13 Aug 2016 20:01:22 +0530 Subject: [PATCH] Update README.md Add description for Selection Sort --- README.md | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/README.md b/README.md index 6d4ac6e41..b643d3686 100644 --- a/README.md +++ b/README.md @@ -61,6 +61,18 @@ __Properties__ ###### View the algorithm in [action][quick-toptal] +## Selection +![alt text][selection-image] + +From [Wikipedia][selection-wiki]: The algorithm divides the input list into two parts: the sublist of items already sorted, which is built up from left to right at the front (left) of the list, and the sublist of items remaining to be sorted that occupy the rest of the list. Initially, the sorted sublist is empty and the unsorted sublist is the entire input list. The algorithm proceeds by finding the smallest (or largest, depending on sorting order) element in the unsorted sublist, exchanging (swapping) it with the leftmost unsorted element (putting it in sorted order), and moving the sublist boundaries one element to the right. + +__Properties__ +* Worst case performance O(n^2) +* Best case performance O(n^2) +* Average case performance O(n^2) + +###### View the algorithm in [action][selection-toptal] + ## Search Algorithms @@ -87,3 +99,7 @@ Add comments here [merge-toptal]: https://www.toptal.com/developers/sorting-algorithms/merge-sort [merge-wiki]: https://en.wikipedia.org/wiki/Merge_sort [merge-image]: https://upload.wikimedia.org/wikipedia/commons/c/cc/Merge-sort-example-300px.gif "Merge Sort" + +[selection-toptal]: https://www.toptal.com/developers/sorting-algorithms/selection-sort +[selection-wiki]: https://en.wikipedia.org/wiki/Selection_sort +[selection-image]: https://upload.wikimedia.org/wikipedia/commons/thumb/b/b0/Selection_sort_animation.gif/250px-Selection_sort_animation.gif "Selection Sort Sort"