# [Haskell-beginners] Calculating Time Complexity

Krzysztof Skrzętnicki gtener at gmail.com
Sun Jan 25 19:51:51 EST 2009

```On Mon, Jan 26, 2009 at 01:04, Matthew J. Williams <
matthewjwilliams1 at googlemail.com> wrote:

> Dear all,
>
> In general terms, how would one calculate the time complexity of a given
> algorithm?

I would count most significant operations. The result is Theta(n^2) (see
http://en.wikipedia.org/wiki/Big_O_notation for definition of Big Theta
notation).

Feel free to make use of my pseudo code in your answer:
>
>                        /* input:
>                        2-D array A of size n by n
>                           output: a number max */
>                        Max := 0
>                        For i := 1 to n
>                          sum := 0
>                          For j := 1 to n
>                            sum := sum + A[i][j]
>                          End for
>                          If sum > max then max := sum
>                        End for
>                           Output max
>
>
Christopher Skrzętnicki
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