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    is this correct? question 1 ? regarding the pivot quick sort
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    this is the question http://www.edexcel.com/migrationdocu...e_20090113.pdf
    question 1)a)
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    Looks all good to me!
    Happy new year
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    (Original post by AndrewD95)
    Looks all good to me!
    Happy new year
    so does it matter for the last one which pivot you chose ?

    in matching how can you see which one is unmatched in improve matching
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    It should have gone MR on the second to last one and then the R would have been the pivot and there would have been no change
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    and i dont understand what you mean in the matching question
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    (Original post by AndrewD95)
    and i dont understand what you mean in the matching question
    http://www.edexcel.com/migrationdocu...e_20110119.pdf

    question 4)b) why is D unmatched and not M
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    thats just an example of an initial matching that they have given
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    (Original post by AndrewD95)
    thats just an example of an initial matching that they have given
    But in mark scheme it only stated D unmatched or can any be an unmatched so for example can i have M unmatched and not D
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    by the look of it they have chosen to start at J for the improved matching, leaving D unmatched. and you cannot make a complete matching until part C
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    (Original post by AndrewD95)
    by the look of it they have chosen to start at J for the improved matching, leaving D unmatched. and you cannot make a complete matching until part C
    yes but like can i have M unmatched or does it have to be D? thats what i dont get
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    How did you get M unmatched?
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    (Original post by AndrewD95)
    How did you get M unmatched?
    Ok you cant i know its wrong as it was not in mark scheme but from the matching not the first drawing the second one how do we know straight away that D is unmatched
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    as far as i can see you could have either D or J as unmatched
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    (Original post by otrivine)
    is this correct? question 1 ? regarding the pivot quick sort
    how many times have you sat this exam?!
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    (Original post by AndrewD95)
    as far as i can see you could have either D or J as unmatched
    Ok but how can you tell?
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    (Original post by JOR2010)
    how many times have you sat this exam?!
    once
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    (Original post by otrivine)
    is this correct? question 1 ? regarding the pivot quick sort
    PIVOTTTT..

    ..

    How long does it take to get a couch up stairs.. *sighh*
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    start with the unmatched ones and get an improved matching from that. it will leave a pair unmatched
 
 
 

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