Tài liệu Thuật toán Algorithms (Phần 6) pptx

... interesting algorithms that we will encounter are based on the divide-and-conquer technique of combining the solutions of recursively solved smaller subproblems. The running time of such algorithms ... program: 46 CHAPTER 4 N 1 multiplications and N additions. The parenthesization = x(x(x(x + 3) 6) + 2) + 1 makes the order of computation obvious: for do y:=x*y+p[i]; This program (and t...

Ngày tải lên: 24/12/2013, 11:15

... by moving all the elements in at least one of them to a large array. It is easy to translate the algorithms we have been examining to use linked representations; in fact, sometimes there are other

Ngày tải lên: 24/12/2013, 11:15

... sorting and a good starting point for the implementation of an external sort. The more sophisticated algorithms below could make the sort run perhaps 50% faster, but not much more. (On the other hand, ... the internal methods that we’ve been studying). There are two major factors which make external algorithms quite differ- ent from those we’ve seen until now. l’irst, the cost of access...

Ngày tải lên: 21/01/2014, 17:20

... hashing method. Hashing is a “classical” computer science problem in the sense that the various algorithms have been studied in some depth and are very widely used. There is a great deal of empirical ... a logarithmic number of steps for all searches and insertions. This is one of the few searching algorithms with that property, and its use is justified whenever bad worst-case performance...

Ngày tải lên: 21/01/2014, 17:20

... disk searching application. Extendible Hashing An alternative to B-trees which extends digital searching algorithms to apply to external searching was developed in 1978 by R. Fagin, J. Nievergelt, N. Pippenger, ... N NPRR STXX As with external sorting, we must consider very small examples to under- stand the algorithms but think about ve y large examples to appreciate their performance. O...

Ngày tải lên: 21/01/2014, 17:20

... This makes the method convenient for use on a large file being read in from some external device. (Algorithms which require backup require some complicated buffering in this situation.) Boyer-Moore

Ngày tải lên: 26/01/2014, 14:20

... part, the algorithms that we have studied have been de- signed primarily to use as little time as possible and only secondarily to conserve space. In this section, we’ll examine some algorithms

Ngày tải lên: 26/01/2014, 14:20

... sentinel): CHAPTER 25 Performance Issues As mentioned in the previous chapter, geometric algorithms are somewhat harder to analyze than algorithms from some of the other areas we’ve studied because the input ... distribution is extremely likely to be very close to the rectangle defining the distribution. The algorithms that we’ve looked at depend on different properties of the point set...

Ngày tải lên: 26/01/2014, 14:20

... 227. Matching, 443-452, 454. match (general regular-expres- sion pattern matching), 265. Mathematical algorithms, 23-88. Mathematical programming, 497. Matrices. addition, 28-29 (matradd). band, 64. chain ... recursive), 145. Selection sort, 95 (selection), 144, 326. Self-organizing search, 175. Seminumerical algorithms, 88. Sentinel, 106, 173, 273, 309, 329, 96, 247, 254, 493. Separate cha...

Ngày tải lên: 15/12/2013, 02:16

... useful algorithms. The book consists of forty chapters which are grouped into seven major parts: mathematical algorithms, sorting, searching, string processing, geomet- ric algorithms, graph algorithms ... structures and algorithms, ” on math- ematical analysis for “design and analysis of algorithms, ” and on software engineering techniques for “software tools”); in this book, the emp...

Ngày tải lên: 15/12/2013, 02:16