I was thinking to use times instead of ^ instead of this:

First, N = 1, 1 ^ 1 = 1, 2 ^ 1 = 2 More efficient: `O(N ^ 2)`

Second, N = 2, 2 ^ 2 = 4, 2 ^ 2 = 4, Same efficiency.

Not always, N = 3, 3 ^ 3 = 9, 2 ^ 3 = 8. More efficient: `O(2 ^ N)`

But this, N = 4, 4 ^ 2 = 16, 2 ^ 4 = 16. Same efficiency.

More, N = 5, 5 ^ 5 = 25, 2 ^ 5 = 32. More efficient: `O(N ^ 2)`

I thought actually this:

First, N = 1, 1 x 1 = 1, 2 ^ 1 = 2 More efficient: `O(N ^ 2)`

Second, N = 2, 2 x 2 = 4, 2 ^ 2 = 4, Same efficiency.

Not always, N = 3, 3 x 3 = 9, 2 ^ 3 = 8. More efficient: `O(2 ^ N)`

But this, N = 4, 4 x 2 = 16, 2 ^ 4 = 16. Same efficiency.

More, N = 5, 5 x 5 = 25, 2 ^ 5 = 32. More efficient: `O(N ^ 2)`

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But I should write it as squared like this:

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With all the extra comparison notes at the end and also, N = 2, N = 4.

Yes I new that before as in this quote from me:

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