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  1. #1
    Join Date
    Oct 2007
    Posts
    132

    need a quick reminder of algorithm complexity basics (easy one for college guys)

    Hey can anybody remind me of the following things which I have forgotten since I took Algorithm Analysis (about 10 years ago!) ...

    (1) advantages/disadvantages of linked lists (for insertion and search)
    (2) " " " of contiguous array
    (3) " " " of associative array (i.e. map / hash)


    I also need a brief reminder of how the following algorithms work, and their advantages/ disadvantages....thanks for any input!

    quick sort
    heap sort
    insertion sort
    merge sort
    quick bucket sort
    shell sort

  2. #2
    Join Date
    Oct 2006
    Posts
    616

    Re: need a quick reminder of algorithm complexity basics (easy one for college guys)

    Very very briefly:
    Quote Originally Posted by andersod2
    (1) advantages/disadvantages of linked lists (for insertion and search)
    Insertion to front / back is O(1), search is O(n).

    Quote Originally Posted by andersod2
    (2) " " " of contiguous array
    Insertion to a sorted array can be O(n) - may need to reallocate larger memory size for the array. Search in a sorted array is O(log n).

    Quote Originally Posted by andersod2
    (3) " " " of associative array (i.e. map / hash)
    Map - depends on implementation - may be binary tree, balanced tree etc.
    Hash table - Disadvantage - requires extra space allocation in advance. Advantage - fast insertion extraction based on how good the hash function is and on the table size (larger table --> lesser chance of need to rehash).

    Quote Originally Posted by andersod2
    I also need a brief reminder of how the following algorithms work, and their advantages/ disadvantages....thanks for any input!

    quick sort
    heap sort
    insertion sort
    merge sort
    quick bucket sort
    shell sort
    A VERY quick google search on each of the above will yield your answers.

    Regards,
    Zachm

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