Get the answers you've been searching for with IDNLearn.com. Join our knowledgeable community and access a wealth of reliable answers to your most pressing questions.

Assume that an O(log2N) algorithm runs for 10 milliseconds when the input size (N) is 32. What input size makes the algorithm run for 14 milliseconds

Sagot :

Answer:

An input size of N = 128 makes the algorithm run for 14 milliseconds

Explanation:

O(log2N)

This means that the running time for an algorithm of length N is given by:

[tex]F(N) = c\log_{2}{N}[/tex]

In which C is a constant.

Runs for 10 milliseconds when the input size (N) is 32.

This means that [tex]F(32) = 10[/tex]

So

[tex]F(N) = c\log_{2}{N}[/tex]

[tex]10 = c\log_{2}{32}[/tex]

Since [tex]2^5 = 32, \log_{2}{32} = 5[/tex]

Then

[tex]5c = 10[/tex]

[tex]c = \frac{10}{5}[/tex]

[tex]c = 2[/tex]

Thus:

[tex]F(N) = 2\log_{2}{N}[/tex]

What input size makes the algorithm run for 14 milliseconds

N for which [tex]F(N) = 14[/tex]. So

[tex]F(N) = 2\log_{2}{N}[/tex]

[tex]14 = 2\log_{2}{N}[/tex]

[tex]\log_{2}{N} = 7[/tex]

[tex]2^{\log_{2}{N}} = 2^7[/tex]

[tex]N = 128[/tex]

An input size of N = 128 makes the algorithm run for 14 milliseconds