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Selection sort is an in-place comparison sorting algorithm that has an O(n2) time complexity. It divides the input list into a sorted sublist and an unsorted sublist, and repeatedly finds the smallest (or largest) element in the unsorted sublist and swaps it with the leftmost element of the sorted sublist.
Cocktail shaker sort is an extension of bubble sort that operates in two directions to sort an array. It has a complexity of O(n^2) and is used mainly as an educational tool.
Learn about the problem of finding the th smallest value in a collection of ordered values, and the algorithms to solve it. Compare different methods such as sorting, heapselect, and quickselect, and their time and space complexity.
Quickselect is a fast and efficient algorithm to find the kth smallest element in an unordered list, based on the quicksort partition scheme. It has good average performance, but poor worst-case performance, and can use various pivot strategies to improve its behavior.
A sorting algorithm is an algorithm that puts elements of a list into an order, such as numerical or lexicographical order. Learn about the history, concepts, and types of sorting algorithms, and see examples and animations.
Insertion sort is a simple sorting algorithm that builds the final sorted array one item at a time by comparisons. It has a worst-case time complexity of O (n2) and a best-case time complexity of O (n), where n is the length of the array.
Heapsort is an in-place algorithm that divides its input into a sorted and an unsorted region, and iteratively shrinks the unsorted region by extracting the largest element from it and inserting it into the sorted region. It uses a binary heap data structure to efficiently find the largest element in each step, and has a worst-case runtime of O (n log n).
Quicksort is an efficient, general-purpose sorting algorithm that works by selecting a pivot element and partitioning the other elements into two sub-arrays. It recursively sorts the sub-arrays and can be done in-place with small additional memory.