Algorithms and Programming: Problems and Solutions (Modern - download pdf or read online

By Alexander Shen

ISBN-10: 0817638474

ISBN-13: 9780817638474

ISBN-10: 0817647600

ISBN-13: 9780817647605

ISBN-10: 3764338474

ISBN-13: 9783764338473

That booklet does not include natural algorithms thought (like Kormen's or Skiena's book), yet difficulties (and such a lot of them are with solutions). each bankruptcy starts off with the straightforward challenge, by way of a few discussions of attainable recommendations, and after progressively more demanding projects ends with beautiful tough problems.
The booklet (in my opinion) is actually very functional (well, it comprises a few concept, yet no longer very formal) and is necessary if you are getting ready to the programming contests or Google/Microsoft-like interviews.

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Additional info for Algorithms and Programming: Problems and Solutions (Modern Birkhäuser Classics)

Example text

If the sequence is no longer nondecreasing, we combine two terms into one. 4. Partitions are represented as nondecreasing sequences. Generate them in reversed alphabetic order. ) [Hint. The element x [s] can be decreased only if s = l or x [ s - l J

What means this insertion for the corresponding sequence of integers? A number that ranges from 0 to n - 1 is appended to the end while the other terms remain unchanged. This one-to-one correspondence can be explained by the following metaphor. Consider n cards with numbers 1 . n written on the cards, and a growing pile made of the cards. Initially the pile has only one card with number 1 written on it. At the next step we add the card with number 2. There are two possible positions for that card (either before the first card or after it).

Determine if the second sequence is a subsequence of the first one, that is, if it is possible to delete some terms of the first sequence to obtain the second one. The number of operations should be of order n+k. Solution. (version 1) Reduce the problem to the same problem involving shorter sequences. 3 Inductive functions 31 {nl = 0 or kl = O; if kl = O, the answer is positive; if k l < > O (and nl = 0), the a n s w e r is n e g a t i v e } answer := (kl = 0); We use the following fact: subsequence of x [ 1 ] .

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Algorithms and Programming: Problems and Solutions (Modern Birkhäuser Classics) by Alexander Shen


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