New execution of listpermutations, Computer Engineering

Assignment Help:

Update the permutation algorithm from the text to obtainthe correct list of permutations even if the string haves repeated letters. For example, if you call ListPermutations on the string "AABB", your program should not generate as many permutations as it does for the string "ABCD" because some of the strings generated by the standard algorithm would be indistinguishable from others. Your program should instead obtain the following six:

AABB

ABAB

ABBA

BAAB

BABA

BBAA

Write a new execution of ListPermutations that works correctly even if the string contains duplicated letters. In writing this execution, you should not merely keep a list of permutations that have already be encountered and avoid generating duplicates. Instead, you should think carefully about the recursive structure of the problem and find a way to avoid generating the duplicates in the first place. You may suppose the string haves only upper case letters from A to Z.

 


Related Discussions:- New execution of listpermutations

Sun and nis law, Q. What is Sun and Nis Law? The Sun and Ni's Law is a ...

Q. What is Sun and Nis Law? The Sun and Ni's Law is a simplification of Amdahl's Law and Gustafson's Law. The basic concept underlying Sun and Ni's Law is to find solution to a

Describe the difference between cache and virtual memory, Question 1: (...

Question 1: (a) What do you meant by an expert system? (b) Describe benefits of the EDI. (c) Describe what you understand by: (i) File Infectors (ii) Boot Sect

What is electronic cash, What is electronic cash? E-cash is cash that i...

What is electronic cash? E-cash is cash that is demonstrated by two models. One is on-line type of e-cash that allows for the completion of all kinds of internet transactions.

How to maintain lists, How to maintain lists? To return from a high li...

How to maintain lists? To return from a high list level to the next-lower level (SY-LSIND), the user chooses back on a secondary list.  The system then gives the currently dis

Interconnection networks, As in PRAM there was not any direct communication...

As in PRAM there was not any direct communication medium between processors so a different model called as interconnection networks have been considered. In the interconnection net

Application of connect-4 game, The game Connect-4 is played on a board that...

The game Connect-4 is played on a board that has seven columns. There are six spaces on each column. The board is initially empty. Two players take turns dropping one piece (black

Explain the processor-memory interconnection network (pmin), Processor-Memo...

Processor-Memory Interconnection Network (PMIN): It's a switch which attaches several processors to distinct memory modules. Connecting each processor to every memory module in

Truth tables, Any function can be expressed in a truth table.A truth table ...

Any function can be expressed in a truth table.A truth table lists all possible combinations ofinputs and gives the output produced in eachcase.Truth tables must include all combin

Explain the instruction decode, Q. Explain the Instruction Decode? Ins...

Q. Explain the Instruction Decode? Instruction Decode: This phase is performed under control of Control Unit of computer. The Control Unit determines the operation which is t

Develop a program which reads hexadecimal number, Q.  Develop a program, wh...

Q.  Develop a program, which reads Hexadecimal number from an input file & convert it into Octal, Binary, and Decimal. The O/P should be written to a file & displayed accordingly.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd