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

What is structural hazard, What is structural hazard? Structural hazard...

What is structural hazard? Structural hazard is the situation when two instructions needs the use of a given hardware resource at the similar time. The most common case in whic

Error detection mechanism must be in-built, Error detection mechanism may i...

Error detection mechanism may include checking mechanical and data communication errors. These errors must be reported to processor. The illustrations of kind of mechanical errors

Multi-threaded concurrency programming with threads, Your task is to implem...

Your task is to implement a memory manager that manages page reads and writes from multiple client threads. In the first programming task the memory manager keeps all the pages in

Why we need linker, Q. Why we need linker?  The linker: Joins as...

Q. Why we need linker?  The linker: Joins assembled module in one executable program, Produces an .EXE module and initializes with special instructions to facilitate

How to select a table, Q. How to select a table? The easiest way to sel...

Q. How to select a table? The easiest way to select a table in Standard view is by using tag selector, which displays HTML tags of elements in document. You will use tag sel

Define micro operation, Define Micro operation. The operations implemen...

Define Micro operation. The operations implemented on data stored in the registers are called Micro operation. A microperation is an elementary operation performed on the infor

Logical difference among move a to b and compute b = a, What is the  logic...

What is the  logical difference among Move A TO B and COMPUTE B = A ? Ans) In case of Move A TO B it will move whatever the value of a in to b. It mean it will move nume

Combining goals and design principles, The Set Book assignment should enabl...

The Set Book assignment should enable you to begin talking about the usability of interactive products in terms of a variety of parameters. Instead of simply saying 'nice cell phon

Library of functions of parallel virtual machine, Q. Library of functions o...

Q. Library of functions of parallel virtual machine? PVM offers a library of functions libpvm3.a, that application programmer calls. Every function has some specific effect in

Convert the given S-R flipflop to a D-flip flop., Convert the given S-R fli...

Convert the given S-R flipflop to a D-flip flop. Ans: The Truth Table for S-R Flip-Flop is illustrated in Fig.(a) and truth table of D Flip-Flop is illustrated in Fig.(b)

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