Runtime and space usage of a snippet of code

Asked Mar 04 '15 at 18:36

Active Mar 05 '15 at 09:17

Viewed 22 times

I've been trying to understand time complexity and space complexity by writing my own snippets of code and solving them. Can you see if I'm correct?

for(int i=1; i<=n; i*=2) c = i+8;
for(int j=n; j>0 ; j/=2) a[j] = 8;

I think the time complexity is $O(log_2n)$ and the space complexity is $O(n)$.

for(int i = 1; i<=n;i*=2)
    for(int j=n ; j>0 ; j/=2)
        a[j] = 8;

In this case, the time complexity is $O((log_2n)^2)$ and the space complexity is $O(n)$.

What do you think?

edited Mar 05 '15 at 09:17

Raphael

asked Mar 04 '15 at 18:36

nightmarish

2

Are you expecting an "yes/no" answer? If you got that answer, you need to be able to justify them. What is your confusion? – w00d Mar 04 '15 at 22:23
Aim for $\Theta$. – Raphael Mar 05 '15 at 09:17

0 Answers0