搜尋結果
Wikipedia[note 3] is a free content online encyclopedia written and maintained by a community of volunteers, known as Wikipedians, through open collaboration and the use of the wiki-based editing system MediaWiki. Wikipedia is the largest and most-read reference work in history.[3][4] It is consistently ranked as one of the ten most popular ...
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- United States
Syphilis ( / ˈsɪfəlɪs /) is a sexually transmitted infection caused by the bacterium Treponema pallidum subspecies pallidum. [1] The signs and symptoms of syphilis vary depending in which of the four stages it presents (primary, secondary, latent, and tertiary). [1] [2] The primary stage classically presents with a single chancre (a firm ...
- Treponema pallidum, usually spread by sex
- Firm, painless, non-itchy skin ulcer
- 107,000 (2015, global)
- Antibiotics
Terminator 2: Judgment Day [a] is a 1991 American science fiction action film directed by James Cameron, who co-wrote the script with William Wisher. Starring Arnold Schwarzenegger, Linda Hamilton, Robert Patrick, and Edward Furlong, it is the sequel to The Terminator (1984) and is the second installment in the Terminator franchise.
- Table of Common Time Complexities
- Constant Time
- Logarithmic Time
- Polylogarithmic Time
- Sub-Linear Time
- Linear Time
- Quasilinear Time
- Sub-Quadratic Time
- Polynomial Time
- Superpolynomial Time
The following table summarizes some classes of commonly encountered time complexities. In the table, poly(x) = xO(1), i.e., polynomial in x.
An algorithm is said to be constant time (also written as O ( 1 ) {\textstyle O(1)} time) if the value of T ( n ) {\textstyle T(n)} (the complexity of the algorithm) is bounded by a value that does not depend on the size of the input. For example, accessing any single element in an array takes constant time as only one operation has to be performed...
An algorithm is said to take logarithmic time when T ( n ) = O ( log n ) {\displaystyle T(n)=O(\log n)} . Since log a n {\displaystyle \log _{a}n} and log b n {\displaystyle \log _{b}n} are related by a constant multiplier, and such a multiplier is irrelevant to big O classification, the standard usage for logarithmic-time algorithms is O ( l...
An algorithm is said to run in polylogarithmic time if its time T ( n ) {\displaystyle T(n)} is O ( ( log n ) k ) {\displaystyle O{\bigl (}(\log n)^{k}{\bigr )}} for some constant k. Another way to write this is O ( log k n ) {\displaystyle O(\log ^{k}n)} . For example, matrix chain ordering can be solved in polylogarithmic time on a parallel r...
An algorithm is said to run in sub-linear time (often spelled sublinear time) if T ( n ) = o ( n ) {\displaystyle T(n)=o(n)} . In particular this includes algorithms with the time complexities defined above. The specific term sublinear time algorithm commonly refers to randomized algorithms that sample a small fraction of their inputs and process t...
An algorithm is said to take linear time, or O ( n ) {\displaystyle O(n)} time, if its time complexity is O ( n ) {\displaystyle O(n)} . Informally, this means that the running time increases at most linearly with the size of the input. More precisely, this means that there is a constant c such that the running time is at most c n {\displaystyle cn...
An algorithm is said to run in quasilinear time (also referred to as log-linear time) if T ( n ) = O ( n log k n ) {\displaystyle T(n)=O(n\log ^{k}n)} for some positive constant k; linearithmic time is the case k = 1 {\displaystyle k=1} . Using soft O notation these algorithms are O ~ ( n ) {\displaystyle {\tilde {O}}(n)} . Quasilinear time algor...
An algorithm is said to be subquadratic time if T ( n ) = o ( n 2 ) {\displaystyle T(n)=o(n^{2})} . For example, simple, comparison-based sorting algorithms are quadratic (e.g. insertion sort), but more advanced algorithms can be found that are subquadratic (e.g. shell sort). No general-purpose sorts run in linear time, but the change from quadrati...
An algorithm is said to be of polynomial time if its running time is upper bounded by a polynomial expression in the size of the input for the algorithm, that is, T(n) = O(nk) for some positive constant k. Problems for which a deterministic polynomial-time algorithm exists belong to the complexity class P, which is central in the field of computati...
An algorithm is defined to take superpolynomial time if T(n) is not bounded above by any polynomial. Using little omega notation, it is ω(nc) time for all constants c, where nis the input parameter, typically the number of bits in the input. For example, an algorithm that runs for 2n steps on an input of size nrequires superpolynomial time (more sp...
Box office. $48–93 million [N 1] The Godfather Part II is a 1974 American epic crime film. The film is produced and directed by Francis Ford Coppola, loosely based on the 1969 novel The Godfather by Mario Puzo, who co-wrote the screenplay with Coppola. It is both a sequel and a prequel to the 1972 film The Godfather, presenting parallel ...
The Sympathizer ( Vietnamese: Cảm tình viên) is a historical black comedy drama miniseries based on the 2015 Pulitzer Prize -winning novel of the same name by Viet Thanh Nguyen. The series was created by co- showrunners Park Chan-wook and Don McKellar, with Park directing for the series as well. The series premiered on HBO on April 14, 2024 ...
The C Programming Language (sometimes termed K&R, after its authors' initials) is a computer programming book written by Brian Kernighan and Dennis Ritchie, the latter of whom originally designed and implemented the C programming language, as well as co-designed the Unix operating system with which development of the language was closely intertwined.
