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Cycle detection. In computer science, cycle detection or cycle finding is the algorithmic problem of finding a cycle in a sequence of iterated function values. For any function f that maps a finite set S to itself, and any initial value x0 in S, the sequence of iterated function values. must eventually use the same value twice: there must be ...
HyperLogLog. v. t. e. In computer science, a skip list (or skiplist) is a probabilistic data structure that allows average complexity for search as well as average complexity for insertion within an ordered sequence of elements. Thus it can get the best features of a sorted array (for searching) while maintaining a linked list -like structure ...
Copy-on-write. Copy-on-write ( COW ), sometimes referred to as implicit sharing[ 1] or shadowing, [ 2] is a resource-management technique used in computer programming to efficiently implement a "duplicate" or "copy" operation on modifiable resources [ 3] (most commonly memory pages, storage sectors, files, and data structures).
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Definition. The most common problem being solved is the 0-1 knapsack problem, which restricts the number of copies of each kind of item to zero or one. Given a set of items numbered from 1 up to , each with a weight and a value , along with a maximum weight capacity , subject to and . Here represents the number of instances of item to include ...
Binary search tree. Fig. 1: A binary search tree of size 9 and depth 3, with 8 at the root. In computer science, a binary search tree ( BST ), also called an ordered or sorted binary tree, is a rooted binary tree data structure with the key of each internal node being greater than all the keys in the respective node's left subtree and less than ...
Median of medians. In computer science, the median of medians is an approximate median selection algorithm, frequently used to supply a good pivot for an exact selection algorithm, most commonly quickselect, that selects the k th smallest element of an initially unsorted array. Median of medians finds an approximate median in linear time.
Leet (or L33t) is an esoteric programming language based loosely on Brainfuck and named for the resemblance of its source code to the symbolic language "L33t 5p34k". L33t was designed by Stephen McGreal [ 1] and Alex Mole to be as confusing as possible. It is Turing-complete and has the possibility for self-modifying code.