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Computer Engineering Homework 2 Solution

Part 1:

Analyze the time complexity (in most appropriate asymptotic notation) of the following procedures by your solutions for the Homework 1:

    I. Searching a product.

II.  Add/remove product.

III. Querying the products that need to be supplied.

Attach the code of your solution for each part just before its analysis.

Part 2:

    a) Explain why it is meaningless to say: “The running time of algorithm A is at least O(n2)”.

    b) Let f(n) and g(n) be non-decreasing and non-negative functions. Prove or disprove that: max(f (n), g(n)) = Θ(f(n) + g(n)).

    c) Are the following true? Prove your answer.

I.  2n+1 = Θ(2n)

II.  22n = Θ(2n)

III. Let f(n)=O(n2) and g(n)= Θ(n2). Prove or disprove that: f(n) * g(n) = Θ(n4).

Part 3:

List the following functions according to their order of growth by explaining your assertions.

n1.01, nlog2n, 2n, √n, (log n)3, n2n, 3n, 2n+1, 5 log2 n, logn

Part 4:

Give the pseudo-code for each of the following operations for an array list that has n elements and analyze the time complexity:

    • Find the minimum-valued item.

    • Find the median item. Consider each element one by one and check whether it is the median.

    • Find two elements whose sum is equal to a given value

    • Assume there are two ordered array list of n elements. Merge these two lists to get a single list in increasing order.
Part 5:

Analyze the time complexity and space complexity of the following code segments:

a)

int p_1 (int array[]):

{

return array[0] * array[2])

}

b)

int p_2 (int array[], int n):

{

Int sum = 0

for (int i = 0; i < n; i=i+5)

sum += array[i] * array[i])

return sum

}

c)

void p_3 (int array[], int n):

{

for (int i = 0; i < n; i++)

for (int j = 0; j < i; j=j*2)

printf(“%d”, array[i] * array[j])

}

d)

void p_4 (int array[], int n):

{

If (p_2(array, n)) > 1000)

p_3(array, n)

else

printf(“%d”, p_1(array) * p_2(array, n))

}
RESTRICTIONS:

    • Answer in detail the questions by using asymptotic notations.

    • Yes / no answers and plagiarisation from the web will not be accepted.

GENERAL RULES:

    • For any question firstly use course news forum in Moodle, and then the contact TA.

    • You can submit assignment one day late and will be evaluated over sixty percent (%60).

REPORT RULES:

    • All the analysis must be stated in the report/answer sheet in details.

    • The report may be handwritten (only for this homework) if you want but, it must be scanned well and submitted to Moodle.

GRADING :

-
Part 1:
20 pts
-
Part 2:
10 pts
-
Part 3:
25 pts
-
Part 4:
30 pts
-
Part 5:
15 pts

    • Disobey restrictions:   -100

-   Cheating:
-200

    • Your assignment is evaluated over 100 as your performance.

CONTACT :

    • Teaching Assistant : Mehmet Burak Koca

    • b.koca@gtu.edu.tr

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